This is a very handy Paint Ball Filler! Features include: Quality product without the name brand price Complete with pressure gauge Easy way to get the proper fill for your paintball tank Made for trans-filling paintball cylinders from scuba cylinders Simply attaches to a standard scuba tank, with the other end to the paintball gun Attach to Yoke or DIN valves #S142 This is a great gauge to get the proper fill for your paint ball gun.