Enviro-Safe 5020 R-134a & R12 Refrigerant 2-In-1 Side Punch AC Can Tap 2-in-1 Side Can Tap This unique design covers 2 7/8" and 2 1/2" charge cans. Dual outlet ports offer a 1/2" ACME and 1/4" FL fitting Outlets fitting with an internal Schrader valve to prevent backflow. Easy connects to R134a manifold gauge sets