Magnet size (mm) : 500*42*26 Armature size(mm): 185*38*11 Holding force : 600lbs/300kgs*2 Voltage/Current : 12v/500mA,24v/250mA Voltage tolerance: 10% Relay dry contact rating : 500mA,24VDC/AC Unit weight (Approx.):5.0kg