Size: 1/2 Body, 1/2 NPT Thread, Poppet Valve. This 1/2 coupler set consists of a male and female quick coupler. Body Material: Brass material for corrosion resistance. Spring Material: 304 Stainless Steel. Locking Ball Material: 316 Stainless Steel. Self Sealing Poppet Valve Seals Excellent Under High and Low Pressures. Interchangeable with all ISO 7241 B series couplings. 2,600 PSI Rating. Nominal Flow Rate: 12 GPM. Max Flow Rate: 23.78 GPM. Seal Type: Viton FKM. Temperature Range: -15°F to +400°F. Female Face Diameter 1.73 (44mm). Female Length: 2.95 (75mm). Hex: 1.06 (27mm). Male Face Diameter .93 (23.5mm). Male Length: 1.83 (46.5mm). Applications: Hydraulic fluids, Water Diesel / Petroleum. Included: Female Coupler, Male Coupler.