Ezra Equis Sprocket 28T Matte Black Available in 28T Tooth Size: 1/8" Thickness/Bore: 6mm - 15/16" Bore w/ 19mm Adapter Included Materials: CNC Machined From 7075 Alloy, Thicker In Areas More Prone to Stress & Thinner Where Less Material is Needed Weight: 3 oz (84 g)