RFS Walform Plus Viton Captive O-Ring Seal, 30S for 30mm Tube, Pressure Rating up to 6000 PSI, Round Viton O-Ring, Pack of 10 Pieces, for Heavy Use : Amazon.ca: Industrial & Scientific
RFS Walform Plus Viton Captive O-Ring Seal, 28L for 28mm Tube, Pressure Rating up to 3600 PSI, Round Viton O-Ring, Pack of 10 Pieces, for Light Use : Amazon.sg: Industrial & Scientific
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