worms:Passed ISO9001,whith high quality ,reasonable price and good sales service! Material: astm 1045# (worm shaft) ASTM standards L=200 one startHaisheng is specialize in manufacturing gears,shafts and gearbox, we can design it make it according to the demands of clients.We can supply all kinds of gears ,such as US, Asian, European cars,buses ,trucks and so on.And we can supply OEM services1: ...