Concrete Mixer Gear 1.Material:Cast Iron 2.Round Gears:1/2A ,3/4A 3.Bevel Gears:1/2B ,3/4B 4.Other Diffrent Size Available Concrete Mixer Gear1.Material:Cast Iron2.Round Gears:1/2A ,3/4A3.Bevel Gears:1/2B ,3/4B4.Other Diffrent Size Available Concrete Mixer Gear