FEATURES: Compatible with Pcl, Vertex, Airflow, Rectus 19 Fittings Etc. Come with 2pcs Female Fitting Male Thread and 2pcs Female Fitting Female Thread And 4pcs Male Fitting Male Thread And 4pcs Male Fitting Female Thread Ideal Start Pack for Quick Release Fittings. Male/Female Quick Release Air Line Hose Fitting Male/Female Thread 1/4"Inch BSP 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. Female Fitting Has Valve Inside to Prevent Air Escaping Whilst Changing Between Tools SPECIFICATIONS: Material: Heat Treated Hardened Steel Finish: Zinc Plated Finish for Rust and Corrosion Resistance. Fitting: Male and Female Fittings Connector Shape and Length: British Style Quick Release Thread Type: 1/4" Inch Bsp Type: Male/Female fitting, male/Female thread Tightening 14mm hex (Male fitting Male thread) Tightening 16mm hex (Male fitting Female thread) Tightening 19mm hex (Female fitting Male/Female thread) PACKAGE CONTENTS: 1/4" BSP Air Line Hose Fitting