uxcell 2Pcs Air Compressor Fittings 3/8"PT Male Thread Oil Level Sight Glass Product Name : Oil Level Sight Glass;Material : Plastic Color : Clear, Black;Thread Diameter : 15.7mm/ 0.6" Thread Size : PT 3/8";Overall Size : 20 x 15.6mm/ 0.8" x 0.6" (Max.D*T) Net Weight : 7g Package Content : 2 x Oil Level Sight Glass