The star coupling is produced of polyurethane, which has the traits of cushioning, vibration reduction and abrasion resistance. It is straightforward to disassemble and assemble, and the functioning temperature is -20ºC~80ºC.The hub supplies are powder metallurgy, forged iron, ball mill forged iron or steel and aluminum alloy.The elastomer is produced of polyurethane, CZPT in 4 different levels of hardness (80A, 92A, 98A, 64D) and withstands different torques, of which 92A is standard.