![Ideal Spectroscopy | Centering Ring KF-16 Vacuum Fittings, ISO-KF Flange Size NW-16, Stainless Steel & Buna, O-Ring Ideal Spectroscopy | Centering Ring KF-16 Vacuum Fittings, ISO-KF Flange Size NW-16, Stainless Steel & Buna, O-Ring](https://www.idealvac.com/files/images/CenterRingKF16.jpg)
Ideal Spectroscopy | Centering Ring KF-16 Vacuum Fittings, ISO-KF Flange Size NW-16, Stainless Steel & Buna, O-Ring
![Kurt J. Lesker Company | ISO-K HV Centering Ring with Outer Ring (316/Ti/1.4571 SS) | Enabling Technology for a Better World Kurt J. Lesker Company | ISO-K HV Centering Ring with Outer Ring (316/Ti/1.4571 SS) | Enabling Technology for a Better World](https://www.lesker.com/newweb/images/product_photos/Photo-HD-F63-STAVR_std.jpg)
Kurt J. Lesker Company | ISO-K HV Centering Ring with Outer Ring (316/Ti/1.4571 SS) | Enabling Technology for a Better World
Centering Ring KF 25 With Viton® O-Ring, KF 25 (NW 25), Stainless Steel, The centering ring contains a rubber elastomeric o-ring. Those are also recognized as NW10, NW16, NW25, NW40, or KF-10
![Ideal Vacuum | ISO 63 Centering Ring Stainless Steel with Viton O-Ring, NW-63 Vacuum Flange Size, Typically Used With 2.5 Inch O.D. (63.50 mm) Tubing Ideal Vacuum | ISO 63 Centering Ring Stainless Steel with Viton O-Ring, NW-63 Vacuum Flange Size, Typically Used With 2.5 Inch O.D. (63.50 mm) Tubing](https://www.idealvac.com/files/images/LF-Centering-Ring-63-80-100.jpg)
Ideal Vacuum | ISO 63 Centering Ring Stainless Steel with Viton O-Ring, NW-63 Vacuum Flange Size, Typically Used With 2.5 Inch O.D. (63.50 mm) Tubing
![810001, Centering Ring, NW100, ISO LF, Large Flange, Fluorocarbon-based fluoroelastomer (FKM / FPM), 304ss | MDC Precision | MDC Precision 810001, Centering Ring, NW100, ISO LF, Large Flange, Fluorocarbon-based fluoroelastomer (FKM / FPM), 304ss | MDC Precision | MDC Precision](https://www.mdcprecision.com/media/catalog/product/cache/4ed3665eb49b6d2f975d77affd7b0bfd/3/5/351010_cr_a_2.jpg)
810001, Centering Ring, NW100, ISO LF, Large Flange, Fluorocarbon-based fluoroelastomer (FKM / FPM), 304ss | MDC Precision | MDC Precision
![Centering Ring KF-40 Vacuum Fittings, ISO-KF Flange Size NW-40, Aluminum & Buna O-Ring (lot of 1pcs): Amazon.com: Industrial & Scientific Centering Ring KF-40 Vacuum Fittings, ISO-KF Flange Size NW-40, Aluminum & Buna O-Ring (lot of 1pcs): Amazon.com: Industrial & Scientific](https://m.media-amazon.com/images/I/61GqnhnXsxL._AC_UF1000,1000_QL80_.jpg)