Our factory specificalzie in all kinds of o-ring kits in nbr, viton, silicone, hnbr, epdm, aflas, ffkm as568 o-rings, jis o-rings kits, o-ring inter diameter from 1mm to 1200mm, cross section size from 0.5mm to 50m including 0.5mm, 1mm, 1.2mm, 1.5mm, 1.78mm, 1.9mm, 2mm, 2.4mm, 2.5mm, 2.62mm, 3mm, 3.5mm, 3.53mm, 4mm, 4.5mm, 5mm, 5.33mm, 5.5mm, 5.7mm, 6mm, 6.5mm, 6.99mm, 7mm, 7.5mm, 8mm, 8.4mm, 8.5mm, 9mm, 10mm, 11mm and so on; Our factory specificalzie in all kinds of o-ring kits in nbr, viton, silicone, hnbr, epdm, aflas, ffkm as568 o-rings, jis o-rings kits, o-ring inter diameter from 1mm to 1200mm, cross section size from 0.5mm to 50m including 0.5mm, 1mm, 1.2mm, 1.5mm, 1.78mm, 1.9mm, 2mm, 2.4mm, 2.5mm, 2.62mm, 3mm, 3.5mm, 3.53mm, 4mm, 4.5mm, 5mm, 5.33mm, 5.5mm, 5.7mm, 6mm, 6.5mm, 6.99mm, 7mm, 7.5mm, 8mm, 8.4mm, 8.5mm, 9mm, 10mm, 11mm and so on;