DHM3 Double Safety Electro Magnetic Brakes,is power off A,voltage:24V Dc B,torque:6N.m~1000N.m C,power:15W~ ... ,speed:5000 DHM5 Double Safety Electro Magnetic Brakes,is power off spring supply,A,voltage:24V DcB,torque:6N.m~1000N.mC ... extend useful life. DHM3-80S Spring Applied Double Safety Electro Magnetic Brake