brushless motor YHwm-37: Widely used in medical equipment, health care instrument, industrial automatic equipment, home electric appliance, auto-industry, and air compressor because of its continous working, long life, low noise, adjustable speed and reversible rotation. outside diameter: 37mm rating voltage: 12V/24V The following is the specification of the YHWM-37 motor. ModelBearingNoiseRating VoltageRating CurrentRating TorqueRating RevPowerdBVmAN.mRPMWYHWM-37-6Ball Bearing< 3265000.08-0.2525003YHWM-37-12Ball Bearing< 32120.90.06-0.21600010.8YHWM-37-24Ball Bearing< 32243000.04-0.1035007 We can develop thisBLDC motor if the user requires the non-standard specification.