Chock quality steel as raw materials carefully punching shaft with the quality pull light round steel tube using the exclusive possession of the designated national roller I plant developed the development of Wujiantao sealed, waterproof and dustproof, dustproof and waterproof performanceexcellent. The entire roller shock absorption, anti-corrosion, light weight, flexible rotation, the moment of inertia of a small amount and characteristics. The entire belt conveyor used in all punching seat idlers, drive power can be reduced by about 30%, and in full compliance with inspection countries under the eight indicators, even more than the national standard roller. Welcome to buy.