Products search Shop By Category Questions? Email us!sales@mackvacuum.com AdaptersCF Flanges and FittingsHigh Vacuum Bellows SS HosesValvesWeld TubesISO Flanges and FittingsKF (QF) Flanges and FittingsAlcatel Vacuum Pump PartsLeybold Vacuum Pump PartsPfeiffer Vacuum Pump PartsWelch Vacuum Pump PartsGreases – SuppliesVacuum Rated HosesUniversities OnlyPressure Measurement VacuumCustom Vacuum Components / Vented ScrewsGS Series Ball ValvesSuper Sale Items316 Stainless Steel ComponentsCENTER RING, ISO 250, VITON, ALUM., RETAINER$65.00Product Code: MKISO250CRAR Category: ISO,LF Flanges and FittingsAlum. Centering Ring with Viton O-ring +Alum. RetainerAvailability: In stock CENTER RING, ISO 250, VITON, ALUM., RETAINER quantity Add to cart Free Shipping on Orders Over $100**Exclusions apply. See Shipping & Return Policy for details.A(inch)B(inch) 11.1810.19 Related products CENTER RING, ISO 100, VITON, ALUM., RETAINER $25.76 CENTER RING, ISO 160, VITON, ALUM., RETAINER $30.46 ADAPTER, 1/4″ MALE NPT, KF (QF) 40, 304 SS $53.03 Sale! ADAPTER, 1/8″ MALE NPT, KF (QF) 16, 304 SS $45.32 $29.00