Ideal Vacuum | Centering Ring with Spacer and Screen, LF-80, ISO NW80, Vacuum Fittings, Stainless Steel with Viton O-Ring for LF-80 Vacuum Fittings, PN: LF80-SRV-SM, LF80SRVSM, LF80 SRV SM
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O-ring Spacer .24" (6.1mm) inside dia EPDM Black Rubber - VCC
Hellcat Spacer Replacement O-ring Kit – Fi Interchillers Online Store