This plum shaft coupler is made of high strength aluminum alloy, excellent bearing capacity, long service life. Widely used in shafting transmission of various mechanical devices, such as pumps, fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation (helicopter), ship high-speed power transmission system, steam turbine, piston power mechanical transmission, etc. Features: Made of high strength aluminum alloy, excellent bearing capacity, long service life. Need no lubrication, convenient and quiet to use. Stable and reliable performance, with good vibration damping, buffering and electrical insulation performance. Simple structure, small radial dimension, light weight, suitable for medium and high speed equipments. Widely used in shafting transmission of various mechanical devices, such as pumps, fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation (helicopter), ship high-speed power transmission system, steam turbine, piston power mechanical transmission, etc. Specification: Material: Aluminum alloy Type: Plum Coupling Shaft Nominal moment of force: 20N.m Allowable speed: 10000r/m Allowable moment of force: 10N.m Size: Approx. 3*2.4cm / 1.2*0.9inch Weight: 27-29g Package Included: 1 x Plum Shaft Coupler Note: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow 1-3cm differences due to manual measurement. Thank you for your kindly understanding.