DescriptionDurable copper material with nickel plated construction, long service life. Easy and convenient to install, suitable for almost all hose. Perfect for connecting lines for air, water, fuel, oil and inert gases. Suitable for car, boat, plumbing, garden, heater, and furnace repair.Features-Color:Silver.-Material:Copper nickel plated. -Size: About3.50X2.80X1.30cm/ 1.38X1.10X0.51in. - Thread: PL 8-1/4 .-The air hose connectors can withstand greater and stronger pressure, easy installation and long service life. - Air hose adapter adopts elbow design, with tight thread, creating an air tight environment in plumbing. - The surface of the air hose connector is wear-resistant, rust-proof, and anti-frosty and it's not easy to leak. - The air hose connectors are high pressure resistance, corrosion resistance, long service life. Easy installation. - Copper nickel plated made, abrasion resistant for use in prevention of fittings against corrosion, dulling and other damage after use.