26mm Male Thread Air Compressor Liquid Sight Glass Oil Level Indicator Product Name : Oil Level Sight Glass;Thread Diameter : 26mm/1" Thread Size : 3/4PT;Glass Dia : 23mm/0.91" Overall Size : 34 x16mm/1.3"x0.63"(Max.D*H);Material : Plastic, Metal Color : As Picture Shown;Net Weight : 29g Package Content : 1 x Oil Level Sight Glass