Product Name: Black Oil Resistant Buna-N Rubber O Ring Model NO.: 9.25*1.78 Standard: Standard Shape: O-Ring Performance: Waterproof Type: Oil Seal Application: Pumps Material: NBR Trademark: ORK Transport Package: PE Inside, Carton Outside Specification: 6.07*1.78 Origin: China HS Code: 4016931000 Product Description Black waterproof Nitrile rubber o ringwhich area we Applied?extensively used in chemical industry, petroleumindustry, medical technique, food industry, sewage-disposal industry, steel industry, semi-conduct industry and so on.What equipment are applied?mechanical sealing, pressure vessel, air compressor, reaction vessel, heatexchanger, boiler, filter and so on.What our our main advantage?1) excellent anti-chemical character. It almost applies to all mediums.2) temperature range is very wide.3) anti oil function is very good.4) long service life.