The BMR geroler motor, 36 to 400 cc — rollers in the gear star give higher pressure tolerance and smoother low-speed torque than a plain gerotor. Replaces Danfoss OMR, Bosch MGR, White WR and M+S MR pattern motors. Each mount and shaft combination is its own listing below — match yours, then pick the displacement inside. Genuine seal kit at the end.