ITEM NAME:20 Pcs 30mm Outside Dia 3.1mm Thick Filter Rubber O Ring Seal Black V1Q6 20 Pcs 30mm Outside Dia 3.1mm Thick Filter Rubber O Ring Seal Black V1Q6 Resist oils, hydraulic fluid and water. Flexible black rubber O ring seal. Used widely for mechanical sealing, pressure vessel, gas compressor, reaction vessel, heat exchanger, boiler, filter, automobile, electrical appliance and other fields. Product Name : Rubber O Ring Material : Rubber Inside Diameter : 23.8mm/0.94" Outside Diameter : 30mm/1.18" Thickness : 3.1mm/0.12" Color : Black Weight : 19g Package Content : 20 x Rubber O Rings 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..Flexible black rubber O ring seal. Material : Rubber. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.