I should say that it works great and fit's the Molino Dirty Harry to make a 90 degree straight injection configuration if you're into dabbing and don't want your giant dab to spill off of the nail. I use metal keck clips to hold my precoolers in place and it broke off at the joint while I was trying to remove the clip at the end of the smoke session. Personally, I think the Black Leaf - 5-arm Perc Precooler With Adapter is a much better product and deal. It has one more perc arm and it also comes with an adapter! I'm glad I ordered both.

This piece is great for adding some smoothness to your bong rips. I bought it because I needed an ash catcher for my bong and this 4-arm diffuser was very well priced so I thought why not. I was very pleased to find out that this piece is very easy to clean, so far I haven't needed anything stronger than soap and water to get it looking like new again. The only reason I rated 4-stars is because of the thin glass used on the bottom of this peice.

nothing to special about this precooler it adds a slight air restriction as do most but it bubbles nice water come out if you bubble hard but that always happens unless you get a tall one. good for the price seems study but not super thick

Added this to my 12'' bong, and it makes every rip sooooo smooth. Coupled with the ice catcher, hits come out straight cold. Excellent overall.

I attached this pre-cooler to my Black Leaf bong and it does a very good job filtering the hit, I tried my bong with and without the pre-cooler, And I definitely don't regret buying this attachment, As it makes a big difference.