Features: Made of wear-resistant pure rubber No phthalates or other heavy metal elements in the rubber; Can be used on iron, aluminum and steel rims; Comes for w/ nuts and spacers for precise alignment; Great braking power in wet and dry conditions, low noise. Specifications: Material: Rubber Size: 12x12x2cm Package Includes: 2 pcs Brake Shoes note: Different batches of brake pads may have different colors. Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!