Uxcell Copper Tone 3-way Air Compressor Fittings Threaded Check Valve Product Name : Air Compressor Check Valve; Color : Copper Tone Male Thread Diameter : 9.8mm / 0.39",16.5mm / 0.65",20.5mm / 0.8";Hex Head Size : 18mm / 0.7" Total Size : 42 x 39 x 37mm / 1.65" x 1.54" x 1.46" (LWT);Material : Brass Weight : 57g Package : 1 x Air Compressor Check Valve