Amber Sage 25T Sprocket - Matte Gold Tooth Count: 25T / Tooth Size: 1/8" Thickness: 5mm Materials: Forged of 6061 Alloy Then CNC Machined, Rounded Tooth Profile for Increased Life of Sprocket & Chains 15/16" Bore w/ 19mm Adapter Included Weight: 2.4oz (68 g)