BBQ Accessories -Alloy Bike Crank Crankset Bicycle Binding Sponge Black Highlights Generic Brand Bicycle Alloy Crank Crankset Binding Bicycle Sponge Black Description: Waterproof, dustproof, super lightweight. Better quality and visual effect, unique rubber design. Two kinds of rubber rings, can fit most bikes well. Application: bicycle integrated hollow crankset (bottom side). For Mountain Bike and Road Bike. Specification: Material: Aluminum alloy Color: Black, Red, Gold, Green, Blue. Size: outer diameter: 26mm / 1.02in; Inner diameter: 19mm / 0.75in; Height: 9mm / 0.35in. Package Include: 1 Piece Crank Cap Note: Please allow 1-3mm error due to manual measurement. And due to the light and screen difference, the item's color may be slightly different from the pictures. Please kindly understand. Make sure you don't mind before your order.