uxcell 10 Pcs 90mm x 100mm x 5mm Nitrile Rubber NBR Seal O Ring Gasket Washer Product Name : Nitrile Rubber O Ring;Material : Nitrile Rubber (NBR) Inside Diameter : 90mm/3.54";Outside Diameter : 100mm/3.94" Thickness : 5mm/0.2";Color : Black Weight : 79g Package Content : 10 x Nitrile Rubber O Rings