Size: 3/8 Body with 1/2 NPT Thread. This 3/8 coupler set consists of a male and female quick coupler. Features: Heavy Duty Design with 5,076 PSI Rating. Max Flow Rate: 12.15 GPM. Locking sleeve helps prevent accidental disconnects. Compact profile with high flow performance. Harden steel construction with anti-corrosive plating. Sleeves are hardened to resist deformation and maximize life of the coupler. Valve design that allows for a minimal pressure drops and one hand operation. Seals are rated for operating temperatures up to 250°F.