PAKA TOOLS 28 Pieces 1/4" NPT Aluminum AND STEEL Air Coupler and Plug Kit, Quick Connect Air Fittings, Industrial Quick Connector Set (BLUE) 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. ➤ 100% SATISFACTION GUARANTEE Item specifics Condition: New: brand-new, unused Qty: Total 28 ( 8 pc 1/4" Coupler + 20 pc 1/4" Plug ) Coupler Body: 1/4" ( 4 pcs male NPT THREAD + 4 PCS FEMALE NPT THREAD) Coupler Material : ALUMINIUM AND STEEL Plug Body: 1/4" ( 10 pcs male NPT THREAD + 10 PCS FEMALE NPT THREAD) Plug Material : ALUMINIUM