I got the unfrosted version because the frosted was out of stock. I really love the look of the fully clear adapter. Bought it for my dynavap, and it works perfectly with the m7 stem. I've also been using it with my One Hit Wonder kit. It's being used in one of the 14mm slots on the dock station to hold my debowler.

Nice little piece of glass!

I got this to use my DynaVap M+ with different water pieces. It works perfectly.

My Dynavap stems, especially my Simrells, all need the gentle touch of unfrosted adapters, so this helps a lot--
I've seen Simrells beat up by frosted glass, so any collectors need this adapter (or one for each rig if you're extravagant). I don't really want to scratch my Dovetail and Futo stems either--it took some time to collect, so I want to baby them a bit.