... quality NBR rubber o ring NBR material, 1. AS568 standard OEM high quality NBR rubber o ring features :1) ... , wearing-resistant, oil-resistant3) Specifications: AS568 Standard4) Colors: black,blue,brown,green, red, white, purpleInner packing : Plastic bagOuter ... resistant b. wearing-resistant c. oil-resistant Specifications AS568 Standard Colors black,blue,brown,green, red, white, purple Packing Inner ...