Well I was searching the forum hoping to find an answer to this question myself...too bad you never got an answer in over 2 years. If no-one knows I'll be giving AHS a call this week to confirm as this is the only size Oetiker listed on the site. Here's the updated link:
"This is an inexpensive solution for holding beer line and air line on tees, nipples, and disconnects"
Posted size is 1/2", none of their 'air line' or 'beer line' hoses are 1/2" OD, can anyone confirm if this is a one-size-fits-all when it comes to clamping keg lines for beer and gas? Or if any of their clamps listed are specifically for beer or gas lines? http://www.austinhomebrew.com/Beer/Clamps/