Features Stainless steel: these air hose connectors are made of stainless steel with coating, rust and corrosion resistance and have a long service life. GOOD SEALING These connectors feature pre-applied sealant on the male thread to reduce air leaks, and require no wrapping and sealing with tape. Wide application: these quick couplings are suitable for pneumatic tools and are used for most common air hoses. They are easy to install and replace. BALL JOINT: These connectors are ball joints that prevent the hose from twisting, increase flexibility and reduce the strain on the wrist and air hose. SPECIFICATIONS: Including 3 male thread and 3 female thread connectors with 1/4"-18 NPT specification to meet different connection requirements. Specification: Item Type:Air Hose Connectors Product material: stainless steel. Product Features The ball head is rotatable to prevent hose twisting and increase flexibility. Perfect for pneumatic tools, reduces the strain on the wrist and air hose and helps improve work efficiency. Package list: 6 x air hose connectors. Package List 6 x Air Hose Fittings