Rebreather divers know the small parts are the ones that keep a dive day on schedule. This counterlung cap set is the genuine Dive Rite replacement for the Chest Mount O2ptima and BMCL O2ptima, so there's no guessing about fit. Keep a spare set in your kit and a worn or missing cap won't be the reason your unit stays on the bench. We dive and service O2ptimas here at the shop, so if you have questions about your setup, just ask.
