Model: RS-750/7751) Size: φ42.2 x 59mm,φ42.2 x 66mm2) Shaft size: φ5.03) Voltage: 6V-36VDC4) Speed: 2,700rpm-20,000rpm5) Weight: 260-300gModel: RS-7751) Size: 42.2 x 66mm2) Shaft size: diameter 5.0mm3) Voltage: 2.4-36V DC4) Speed: 3,000-25,000rpm5) Weight: 310g/pc approx.These motors are mainly used as typical application/office automation equipment, electric drill, computer peripherals/printer automotive products, car accessories and lumber support.Packing: carton