Injection screw and barrel material: high quality alloy steel 1)38CrMoALA 2)42CrMo 3) ... capacity of injection:30g~30000g,can be matched with corresponded screw heads, distributors,barrels according to customer's requirementDepth of Nitrated ... finish, High-frequency quenching,Bimetallic-alloy coating,Vacuum quenching injection screw and barrel