Grav Labs 18mm to 14mm 4.5 Fission Downstem

This inside-cut 18.8mm>14.5mm perforated diffuser downstem is a must-have bong part that adds important filtration and diffusion to the smoke.

Another awesome accessory by grav, this 4.5” fission downstem is a great match for any matching sized beaker or a straight tube pipe with an angled joint.

The downstem has smooth edges that eliminate clogging and multiple fissure holes for an improved smoking experience. It delivers clean hassle-free hits and is easy to use.

This downstem connects with bong’s 18.8mm ground joint and fits 14.5mm male herb bowls. Completed with the recognizable Grav Labs logo.