ITEM NAME:50x Black 16mm OD 9mm Inner Dia Nitrile Rubber O-ring Oil Seal Gasket Z5C6 50x Black 16mm OD 9mm Inner Dia Nitrile Rubber O-ring Oil Seal Gasket Z5C6 Features high and low temperature resistance, UV-resistance, Ozone resistance, abrasion resistance. Applications: automobile, electrical appliance, mechanical, industrial, construction, household, and other fields. Product Name : O Ring Color : Black Material : Nitrile Rubber(NBR) Quantity : 50 Pcs External Diameter : 16mm / 0.629 inch Inner Diameter : 9mm / 0.354 inch Thickness : 3.5mm/ 0.137 inch Weight : 30g Package Content : 50 x NBR O Ring Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Features high and low temperature resistance, UV-resistance, Ozone resistance, abrasion resistance. Material : Nitrile Rubber(NBR). 50 x NBR O Ring.