Stay Strong RACE DVSN rear cogs�are CNC machined from�7075 alloy. The 3/32""�rear cogs are available in 14 to 18 tooth sizes and designed to fit Shimano compatible cassette hubs. The alloy cogs are anodised black. Material: Fully CNC machined 7075 Alloy 4mm thick Shimano cassette fit Sizes Available: 14T, 15T, 16T, 17T, 18T Colour:�Black Weight - g "