1. 42CrMo4 casted then CNC by 5 axles. 2.high precision in holes position and dimensions' torlerance. 3.Industrial automaton. 1.materialalloy 42crmo4,carbon steel2.processsand casting and 5 axles cnc3.strengthspecial process to guarantee the high precision4.charactersmall order,punctual delivery time.5.net weight8.5kgs6.usagetransmission equipment parts,gas and oil parts,engergy parts