uxcell 16.5mm 3/8" PT Male Thread Dia Pneumatic 4.2mm Air Hose Quick Coupler Connector Product Name : Quick Coupler;Male Thread Diameter : 16.5mm / 3/8" PT Fit Tube Outside Dia. : 4.2mm / 0.17";Overall Size : 25 x 17mm / 1" x 0.67"(L*Max.D) Main Color : Silver Tone;Main Material : Chrome Plated Solid Brass Weight : 15g Package Content : 1 x Quick Coupler