Diffusers

At Grasscity.com we offer a wide range of diffusers. We have diffusers that serve as a connector for your bong and complete downpipes (stem with bowl). Diffusers cause an air whirl and produce little bubbles that cool the smoke. A downright innovation for a smooth smokin' experience.
 
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  1. Pulse Glass - Barrel Diffuser Downstem - 18.8mm - 4.5 inch

    Pulse Glass - Barrel Diffuser Downstem - 18.8mm - 4.5 inch

    List Price: $40.00

    Our Price: $28.00

    You save: $12.00

    Downstem with barrel diffuser tip, from Pulse Glass!

    • Made in the USA, ships from the USA

    • High quality German Schott glass

    • Real platinum Pulse Glass logo


    Learn More
  2. Pulse Glass - Barrel Diffuser Downstem - 18.8mm - 5 inch

    Pulse Glass - Barrel Diffuser Downstem - 18.8mm - 5 inch

    List Price: $40.00

    Our Price: $28.00

    You save: $12.00

    Downstem with barrel diffuser tip, from Pulse Glass!

    • Made in the USA, ships from the USA

    • High quality German Schott glass

    • Real platinum Pulse Glass logo


    Learn More
  3. Pulse Glass - Barrel Diffuser Downstem -14.5mm > 18.8mm - 4.5 inch

    Pulse Glass - Barrel Diffuser Downstem -14.5mm > 18.8mm - 4.5 inch

    List Price: $40.00

    Our Price: $28.00

    You save: $12.00

    Downstem with barrel diffuser tip, from Pulse Glass!

    • Made in the USA, ships from the USA

    • High quality German Schott glass

    • Real platinum Pulse Glass logo

    • Joint 14.5 > 18.8mm


    Learn More
  4. Weed Star - 4-arm Perc Downstem Bong Adapter - 29.2 mm > 18.8 mm

    Weed Star - 4-arm Perc Downstem Bong Adapter - 29.2 mm > 18.8 mm

    List Price: $25.00

    Our Price: $17.50

    You save: $7.50

    A spare or replacement diffuser downstem and adapter from Weed Star!
    • Inside-cut 29.2mm > 18.8mm joint

    • Weed Star logo in blue

    • 4-arm slitted tree perc diffusion for extra bubbling

    • Various lengths available

    Learn More
  5. Blaze Glass - Removable 5-Arm Tree Percolator 18.8mm

    Blaze Glass - Removable 5-Arm Tree Percolator 18.8mm

    List Price: $25.50

    Our Price: $17.85

    You save: $7.65

    A removable 5-arm perc that changes color as you use it!
    • Reinforced

    • Color-changing silver fumed glass

    • Can be interchanged with any other 18.8mm removable perc
    Learn More
  6. Removable "Honey Comb" 7-arm Tree Percolator - End of line discount pricing

    Removable "Honey Comb" 7-arm Tree Percolator - End of line discount pricing

    List Price: $7.50

    Our Price: $5.25

    You save: $2.25

    Removable 7-arm Tree Percolator

    • Spare part for the Mad Scientist V3

    • Reinforced with glass between each arm


    Learn More
  7. Blaze Glass - Diffusor Adapter Downstem - 18.8mm > 14.5mm

    Blaze Glass - Diffusor Adapter Downstem - 18.8mm > 14.5mm

    List Price: $20.65

    Our Price: $14.46

    You save: $6.19

    A 4x4 diffuser and adapter in one!
    • High quality borosilicate glass

    • Inside-cut glass-on-glass joint

    • Blaze Glass logo in high-gloss silver
    Learn More
  8. EHLE. Glass - Diffuser Downstem

    EHLE. Glass - Diffuser Downstem

    List Price: $32.69

    Our Price: $22.88

    You save: $9.81

    Handmade glass diffuser downstem from EHLE!
    • Made in Germany

    • High grade Schott Duran borosilicate glass

    • Pinpoint precision fit

    • Choose joint size and length
    Learn More
  9. Weed Star - 4-arm Diffuser Downstem

    Weed Star - 4-arm Diffuser Downstem

    List Price: $25.00

    Our Price: $17.50

    You save: $7.50

    A spare or replacement diffuser downstem and adapter from Weed Star!
    • Quality borosilicate glass

    • Inside-cut 29.2mm > 18.8mm joint

    • Weed Star logo in blue

    • 4-arm slitted tree perc diffusion for extra bubbling



    This tree-perc downstem is extra long, so remember to check if it will fit your pipe! Learn More
  10. Weed Star - Circ Perc Downstem Bong Adapter - 29.2 mm > 18.8 mm

    Weed Star - Circ Perc Downstem Bong Adapter - 29.2 mm > 18.8 mm

    List Price: $15.00

    Our Price: $10.50

    You save: $4.50

    A spare or replacement diffuser downstem from Weed Star!
    • Quality borosilicate glass

    • Inside-cut 29.2mm > 18.8mm joint

    • Weed Star logo in blue

    • Shower head diffusion for extra bubbling

    • Choose length when ordering
    Learn More
  11. Weed Star - Slitted Diffuser Downstem - 18.8mm

    Weed Star - Slitted Diffuser Downstem - 18.8mm

    List Price: $12.99

    Our Price: $9.09

    You save: $3.90

    A spare or replacement downstem, from Weed Star!
    • Quality borosilicate glass

    • Sure ground glass-on-glass joints

    • Etched Weed Star logo

    • Slitted for extra bubbling and diffusion
    Learn More
  12. Bong Adapter with Diffuser

    Bong Adapter with Diffuser

    List Price: $6.46

    Our Price: $2.50

    You save: $3.96

  13. Pearl Adapter 18.8

    Pearl Adapter 18.8

    List Price: $31.42

    Our Price: $22.00

    You save: $9.42

  14. Weed Star Slit Hole Diffuser Downstem - 29.2mm > 18.8mm

    Weed Star Slit Hole Diffuser Downstem - 29.2mm > 18.8mm

    List Price: $23.08

    Our Price: $16.15

    You save: $6.93

    A spare or replacement diffuser downstem from Weed Star!
    • Quality borosilicate glass

    • Large inside-cut 29.2mm > 18.8mm joint

    • Weed Star logo in blue

    • 21 flame-polished piercings for extra bubbling and diffusion
    Learn More
  15. Weed Star - Slitted Diffuser Downstem - 29.2mm

    Weed Star - Slitted Diffuser Downstem - 29.2mm

    List Price: $15.00

    Our Price: $10.50

    You save: $4.50

    A spare or replacement diffuser downstem from Weed Star!
    • Sure ground glass-on-glass joints

    • Weed Star logo in blue

    • Slitted for extra bubbling and diffusion

    • Length 12.5 cm / 4.9 inch
  16. Learn More
  • Weed Star - Pearl Diffuser Downstem - 14.5mm

    Weed Star - Pearl Diffuser Downstem - 14.5mm

    List Price: $13.99

    Our Price: $9.79

    You save: $4.20

    A spare or replacement diffuser downstem from Weed Star!
    • Quality borosilicate glass

    • Sure ground glass-on-glass 14.5mm > 14.5mm joints

    • Weed Star logo in blue

    • Flame-polished piercings for extra bubbling and diffusion

    • Choose length when ordering
    Learn More
  • Weed Star - Removable Dome Perc with Piercings - 18.8mm Male Joint

    Weed Star - Removable Dome Perc with Piercings - 18.8mm Male Joint

    List Price: $10.00

    Our Price: $7.00

    You save: $3.00

    Interchangeable bong perc for mix and match fun!
    • Sure ground glass-on-glass male joint

    • Blue glass loop at top for easy maneuvering with metal hook

    • Fits Weed Star's Mahony and Mad Professor 2.0 (not 3.0)

    • Fits any removable perc bong with 18.8mm female joint

    Learn More
  • Alex K Glass - Showerhead Diffuser Downstem - 18.8mm

    Alex K Glass - Showerhead Diffuser Downstem - 18.8mm

    List Price: $46.00

    Our Price: $32.20

    You save: $13.80

    Handmade, high-end glass diffuser downstem by Alex K!
    • Made in the USA in Minneapolis, Minnesota

    • Ships from the USA

    • High quality borosilicate glass

    • Sure-ground glass-on-glass joints

    • Alex K Black Label logo

    • Choose length when ordering

    Learn More
  • Black Leaf - Inside-Cut Vortex Diffuser Downstem

    Black Leaf - Inside-Cut Vortex Diffuser Downstem

    List Price: $18.75

    Our Price: $12.50

    You save: $6.25

    Adds powerful diffusion, available in various lengths!
    • High-quality borosilicate glass

    • Sure ground inside-cut glass-on-glass joint

    • 10-slit Vortex percolator

    • Black Leaf logo

    • Choose downstem length when ordering


    Learn More
  • Weed Star - Pearl Diffuser Downstem - 18.8mm

    Weed Star - Pearl Diffuser Downstem - 18.8mm

    List Price: $13.95

    Our Price: $9.77

    You save: $4.18

    A spare or replacement diffuser downstem from Weed Star!
    • Quality borosilicate glass

    • Sure ground glass-on-glass 18.8mm > 18.8mm joints

    • Weed Star logo in blue

    • Flame-polished piercings for extra bubbling and diffusion

    • Choose length when ordering
    Learn More
  • Blaze Glass - Shower Perc Diffuser Adapter Downstem - 29.2mm > 18.8mm

    Blaze Glass - Shower Perc Diffuser Adapter Downstem - 29.2mm > 18.8mm

    List Price: $33.75

    Our Price: $23.63

    You save: $10.12

    A frosted glass shower perc diffuser and adapter in one!
    • Inside-cut glass-on-glass joint

    • 10-slit circular percolator

    • Downstem length from joint to perc: 12cm / 4.7"
    Learn More
  • 2K Diffuser Beads - Choice of 9 colors

    2K Diffuser Beads - Choice of 9 colors

    List Price: $17.50

    Our Price: $12.25

    You save: $5.25

    Diffuser beads for your bong that cool down smoke and make hundreds more bubbles!
    • Ships from the USA

    • Jar of 500-600 beads

    • Bead diameter is 6mm / .25 inches

    • Reusable and easy to clean

    • Cap with ash poker underneath

    • Choose from several colors, as available
    Learn More
  • G-Spot Glass - Diffusor Rings

    G-Spot Glass - Diffusor Rings

    List Price: $18.98

    Our Price: $13.29

    You save: $5.69

    Get bubbly, cool, filtered smoke with G-Spot's diffusion rings!
    • Reusable and easy to clean

    • Choose 10mm diameter (not for ice bongs) or 6mm diameter

    Learn More
  • Black Leaf - Inside-Cut Shower Head Perc Diffuser Downstem

    Black Leaf - Inside-Cut Shower Head Perc Diffuser Downstem

    List Price: $17.50

    Our Price: $7.50

    You save: $10.00

    Add shower perc diffusion to any set-up, available in various lengths!
    • High-quality borosilicate glass

    • Sure ground inside-cut glass-on-glass joint

    • 10-slit circular percolator

    • Black Leaf logo

    • Choose downstem length when ordering


    Learn More
  • Blaze Glass - Diffuser Adapter Downstem - 29.2mm > 18.8mm

    Blaze Glass - Diffuser Adapter Downstem - 29.2mm > 18.8mm

    List Price: $29.25

    Our Price: $20.48

    You save: $8.77

    A 4x4 diffuser and adapter in one!
    • Inside-cut glass-on-glass joint

    • Downstem length: 15.5cm / 6.1 inches

    • Blaze Glass logo in high-gloss silver

    Learn More
  • Items 1 to 25 of 28 total

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