Size: 3/8 Body, 3/8 NPT Thread, Poppet Valve. This 3/8 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. 3,000 PSI Rating. Nominal Flow Rate: 6.08 GPM. Max Flow Rate: 12.15 GPM. Seal Type: Viton FKM. Temperature Range: -15°F to +400°F. Female Face Diameter 1.38 (35mm). Female Length: 2.57 (65mm). Hex: .86 (22mm). Male Face Diameter 0.75 (19mm). Male Length: 1.67 (42.5mm). Applications: Hydraulic fluids, Water Diesel / Petroleum. Included: Female Coupler, Male Coupler.