Vortex 454S-40 Black 40-Tooth 525-Pitch Steel Rear SprocketTechnical Specifications: Brand: Vortex Placement: Rear Pitch: 525 Teeth: 40 Teeth Color: Black Material: Steel MPN: 454S 40 Vortex steel rear sprockets are made from carbon steel and electroplated with a satin black finish that resists corrosion The sprocket teeth are hardened so sprocket will hold up to many miles, without affecting strength Vortex steel rear sprockets are also cupped down from the tooth ring to body to reduce as much weight as