Advantages of using an O-ring very compact and occupy a small amount of space, suit static and dynamic applications, seal efficiently in both directions, depending on material type can work between -65° and +325°C and when in used in PTFE work at -200°C. We stock standard O-rings in Nitrile, Viton, PTFE, Silicone, EPDM, Neoprene and many non standard , miniature and micro sizes.