[11T Golden]
Specifications:Item: Bike Guide Roller Material: Aluminum Alloy + Ceramic Colour: Black, Golden (Optional) Diameter: 4 cm / 1.6 inch (11 T), 5 cm / 2.0 inch (13 T) Weight: 21-23 g Package Included: 2 * Bike Guide Roller 2 * Installation Hole Adapter Tubes (Other things on the pictures are not included)