Rubber O RingsAvailable material:SIR, NBR, SBR, FDA EPDM, NR,IIR,etc. ... various rubber products according to your drawing and design. Rubber O Rings1. Material: SIR, NBR, CR, NR, SBR, EPDM, IIR, etc ... drawings or samples10 OEM and ODM orders are welcome Rubber O Rings