![Ideal Spectroscopy | Centering Ring Assembly KF-16 with Screen, ISO-KF Flange Size NW-16, Stainless Steel & Viton® O-Ring, 4 micron 88396 Ideal Spectroscopy | Centering Ring Assembly KF-16 with Screen, ISO-KF Flange Size NW-16, Stainless Steel & Viton® O-Ring, 4 micron 88396](https://www.idealvac.com/files/images/FineFilter-CenteringRing-DN40-ISO-KF40-4mic_88398.jpg)
Ideal Spectroscopy | Centering Ring Assembly KF-16 with Screen, ISO-KF Flange Size NW-16, Stainless Steel & Viton® O-Ring, 4 micron 88396
![Centering Rings 54mm to 75mm [13424] - $8.69 : Apogee Rockets, Model Rocketry Excitement Starts Here Centering Rings 54mm to 75mm [13424] - $8.69 : Apogee Rockets, Model Rocketry Excitement Starts Here](https://www.apogeerockets.com/bmz_cache/d/dfc4c4696166944c0e55e4bdfcee3ae0.image.700x361.jpg)
Centering Rings 54mm to 75mm [13424] - $8.69 : Apogee Rockets, Model Rocketry Excitement Starts Here
![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)
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 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 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)