... -cord, square cord,,etc. for NBR, VITON, SILICON,,,,ETC Viton O-RING CORD, viton RUBBER ROPE,viton rubbe sheet:The sizes from 3mm, 3.5mm ... ,4mm,5mm,6mm,7mm, 8mm,9mm,10mm,11mm,12mm,,,etc.Viton(FKM ... the different type in different sizes.good quantity , better price. viton seals, FKM seals, silicone seals, NBR seals,o-ring cord ...