... 1,Name: Left hand steel alloy worm wheel;Left hand worm wheel;Steel alloy worm wheel 2,For the similar worm wheel ,what can we do ... ?(1), Ability for the material of this kind of worm wheel: Grade3.6,4.6,4.8,5.6,6.8 ... plated(while,colour,dacroment),Nickel plated,copper plated,gold plated,chrome(3+Rohs &6+ ) plated,anodic oxidation,etc Dip plating black ...