5 Piece, 1/4" NPT, M-Style Coupler & Plug Kit, Basic Flow Size, All 1/4" Body Size Air Fittings, 1/4" NPT, Buna-N Seals, Couplers For Air Shop Use, Kwik Change Interchangeable/Compatible With Most Manufacturers, Maximum 40 SCFM, 300 PSI, Temperatures Up To 250 Degrees Fahrenheit, Durable Brass Couplers, Case-Hardened Steel Plugs, Plated To Resist Rust & Corrosion, Kit Includes: 1 Female Coupler, 3 Male Plugs & 1 Female Plug.