... 3. OEM for special sample or drawing High precision casting steel double spur gear Most popular form and the most efficient ... 2-M1.2 3.Gear precision: class 44.Material: brass, steel, stainless steel, alluminum 5.Serface treatment: zinc plating, nickle plating, chome ... platingFeatures:1.Material: carbon steel such as C45, 20CrMnTi, 40Cr, 42CrMo or stainless steel or copper or nylon and so ...