uxcell 1" Thread Dia Air Compressor Fittings Clear Plastic Oil Sight Glass Product Name : Oil Level Sight Glass;Material : Plastic Color : Clear, Black, Red;Thread Diameter : 26mm/ 1" Overall Size : 38 x 22mm/ 1.5" x 0.87" (D*T) Net Weight : 11g Package Content : 1 x Oil Level Sight Glass