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■Size: Total length 2.8 inches (7 cm) x outer diameter 0.9 inches (2.4 cm) Weight: 4.5 oz (145 g) / Pair Compatible Axle Diameter: 0.4 inches (10 mm) (BC 3/8" x 26TP) Material: Aluminum Alloy ■ A must-have for BMX performers, set of 2 aluminum lightweight steps ■ Can be mounted on most bicycles. (BMX, mountain bike, cross bike, mini velo, fat bike, beach cruiser, etc.). This is a custom part that is useful for protecting the bicycle transmission (derailleur) parts. Due to the nature of the product, there may be scuffs and minor scratches in the manufacturing and transportation of the product. Please be aware of this before purchasing. This is very dangerous, so please do not use it for two passengers of bicycles.