uxcell 26mm Male Threaded Metal Air Compressor Oil Level Sight Glass Product Name : Oil Level Sight Glass;Material : Metal Color : Silver Tone, Black;Thread Diameter : 26mm / 3/4" NPT Overall Size : 33 x 16mm / 1.3" x 0.63" (D*H) Net Weight : 25g Package Content : 1 x Oil Level Sight Glass