Description <br> Convenient Bicycle Accessory: These Aluminum Alloy Steering Wheel Hub Spacers fit 10 speed cassette on 11 freehub, 7, 8, 9 speed cassette on 10 11 speed freehub, 7 speed cassette on an 8, 9-speed freehub <br> QUALITY MATERIAL: Made of anodized aluminum alloy, these bicycle spacers are lightweight and durable, helping you achieve good symmetry with minimal effort, and you can use these bicycle stem spacers with confidence <br> Multifunctional Spacers: These bottom bracket washers can be applied to most bikes 7 8 9 10 11-speed cassette freewheel conversion, bottom bracket adjustment <br> Detailed Size: The inner size of the spacer is measured by 35mm in diameter, while the outer diameter is about 42mm, suitable size to fit your speed cassette <br> Sufficient quantity: you will get 10 pieces of speed cassette bicycle spacers, which consist of 2 pieces of 1mm, 2 pieces of 1.5mm, 2 pieces of 2mm, 2 pieces of 2.5mm, 2 pieces of 3mm spacers, each size has 1 piece of red spacer and 1 piece of black spacer <br> <br> Material:Aluminum alloy <br> colour:Black+red <br> <br> Package Contents: <br> 2 x 1mm spacers <br> 2 x 1.5mm spacers <br> 2 x 2mm spacers <br> 2 x 2.5mm spacers <br> 2 x 3mm spacers <br> <br> Only the above package content, other products are not included. <br> Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. <br>