ISO Standard O'Ring in size NW16. Compatible with NW, KF, QF and ISO standards. Manufactured generally in the USA. Some exceptions apply. This is a building block approach for creating and supporting vacuum systems to 10-6 Torr. Elastomers commonly available Buna-N, Viton, EPDM, Silicone and Teflon are standards any others are available generally all special order.
Warranteed 100% from defects in materials and workmanship.