Ones 3/8" and ones 1/2"....Felt the need to blow some cash today Even with the blichmann ball valves it was still cheaper than buying one from my HBS or online The 1/2" one sticks out a bit far cause i had to use a 1/2"x3/8" reducer to make it work.. Also looks like Blichmann changed there design a bit, the 3/8" I bought 2 months ago and finally the 1/2" came in today...Maybe thats why alot of there stuff is back ordered, there redesigning there stuff a bit..