Flexzilla Pro High Flow Coupler & Plug Kit (7 Piece), 1/4" NPT - A53457FZ TWICE THE FLOW - Larger internal diameter compared to standard interchanges PUSH-TO-CONNECT COUPLERS - Easily attach your air tools INCREASED EFFICIENCY - Maximum torque and maximum RPM 300 POUNDS PER SQUARE INCH - Maximum working pressure PREMIUM MATERIALS - 1/4" body made from nickle plated steel with anodized aluminum sleeves