Function: Made of high quality silicone, lightweight, sturdy and durable. Silicone material, environmental protection, non-toxic, tasteless. Soft, anti-slip, shockproof, heat resistant, oil resistant, fade resistant, easy to clean. Perfect for protecting bike cranks. Suitable for most cranks. Specifications: Condition: 100% Brand New Material: Silicone Color: Black a> Package List: 1 set x Crank(4 pcs)