CNBTR 45 Steel 1.5 Modulus Silver 8mm Hole Diameter Tapered Bevel Gear Wheel 20 Teeth Pack of 2 Made of 45 steel with high wear-resistance, strong and durable. Tapered Bevel Gear Wheel, 1.5 Modulus, 20 teeth, 8mm hole diameter. Used widely in conveying, agricultural equipment, textile machinery, printing machinery, automotive applications, etc.