Feature●✅ Inlet: 1/8" M NPT●✅ Outlet: 1/4" M NPT●✅ Check valve included●✅ Stainless steel braided for abrasion resistance●✅ Use thread sealant for installationDescription Steel braided 18 inches leader hose for air compressors. Includes pre-installed heavy duty check valve to prevent air from leaking back through the compressor.