DURABLE ALUMINUM CONSTRUCTION: Made of Aluminum, Long-Lasting and Resistant to Corrosion. DO THE BEST TO PREVENT LEAK: All Male Thread with Sealent for No Leaking and Come with Tape. EASY CONNECT SYSTEM: Sleeve Guard Helps Reduce the Risk of Accidental Disconnects and Protects the Coupler Sleeve. WIDELY USE: Interchangeable with Most Manufacturers and Easily Locks Tool onto Air Hoses. 1/4inch NPT 15 Pieces Industrial Aluminum Quick Connect Set helps you switch quickly between different air tools and accessories. It is perfect for any shop or garage to quickly and safely disconnect air hoses. The plugs of air fittings can be widely used in such as air compressors, automatic manufacturing operations, aircraft controls, and tire installation in industries including agriculture, mining, road construction, firefighting, and aviation. Air Coupler and Plug Kit Includes: 2pcs - 1/4inch NPT Aluminum Female Coupler 2pcs - 1/4inch NPT Aluminum Male Coupler 4pcs - 1/4inch Industrial Series Aluminum Plug with 1/4inch NPT Female Thread 6pcs - 1/4inch Industrial Series Aluminum Plugs with 1/4inch NPT Male Thread 1pc - Tape Colour:red Material:aluminum Package Contents: 1 set x air hose fittings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.