ITEM NAME:12PCS Air Line Set Fitting Air Hose Connectors Compressor 1/4" and 3/8" BSP Description: - Made of heat treated hardened Iron for strength and durability. - Nickel plated finish for rust and corrosion resistance. - Spring loaded quick release couplers for use on the compressor side have a valve built in to shut off the air when changing between tools. - Simple to use, just slide back the collar and insert the fitting, then slide the collar fully back to lock in place. - Enables tools and airlines to be quickly connected / disconnected. Specification: - 1 Piece Female Quick Release Coupler with 1/4" BSP Male Thread. - 1 Piece Female Quick Release Coupler with 1/4" BSP Female Thread. - 1 Piece Female Quick Release Coupler with 3/8" BSP Male Thread. - 2 Pieces Male Fitting with 1/4" BSP Male Thread. - 2 Pieces Male Fitting with 1/4" BSP Female Thread. - 1 Piece Male Fitting with 3/8" BSP Male Thread. - 1 Piece Male Fitting with 3/8" BSP Female Thread. - 3 Pieces Male Fittings for 6mm, 8mm and 10mm hose. Package Included: 12 Pieces Air Line Hose Compressor Fitting Connector Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making.1 Piece Female Quick Release Coupler with 1/4" BSP Male Thread. - 1 Piece Female Quick Release Coupler with 1/4" BSP Female Thread. - 1 Piece Female Quick Release Coupler with 3/8" BSP Male Thread.