uxcell Air Compressor Spare Fittings 16mm Thread Diameter Oil Connector Blue Product Name : Air Compressor Oil Connector;Main Material : Plastic Main Color : Blue;Male Thread Diameter : 16mm/ 0.64" Hole Inside Diameter : 9mm/ 0.37";Total Size : 9.7 x 3.6cm/ 3.8" x 1.4"(L*W) Weight : 40 Package : 1 x Air Compressor Oil Connector