Length 65.20mm Small Outside Ø 25.4mm Large Outside Ø 26.70mm Small Inside Ø 22.20mm Large Inside Ø 23.50mm Must be rolled top and bottom with Churchill service tools LC.173 and LC.174 (not available). Should be fitted with EM9599 injector washer. If rolling tools are not available, EM9388 can be used in place of EM9598 which does not require rolling.