1.O-Rings offer an efficient and economical sealing element for a wide range of static or dynamic applications.
2.O-Ring sizes are defined by the inner diameter-ID and the cross section-CS , our o-ring Inner Diameter can be from 0.5mm to 1500mm . 
3.Standard sizes such as AS568(PARKER sizes), JIS(P TYPE,G TYPE,S TYPE ,V TYPE ,F TYPE sizes) , BS1516 sizes Metric sizes as well as non-standard sizes are all avaiblabe.
4.We have more than 2000 o-ring mould toolings , so you could get any size here without set-up or tooling charge . Huge inventory of o-rings can meet your urgent requiremnets.
5. A very wide range of elatomer material can be selected , main material: NBR(BUNA-N,Nitrile) , VITON(FKM) , Silicone(VMQ) ,HNBR, FFKM ,EPDM , PU(Polyurethane , urethane),Fluorosilicone(FVMQ),Neoprene(CR) and so on. Hardness of material can be from 40 ShoreA(Durometer) to 90 ShoreA(Durometer)