Note: This is the old model, the new model has been improved on the basis of this one. This is now a special price! Specification: Brand: ROCKBROS Material: Alloy Weight: approx. 100g Application: structure for rear axle quick release Features: Suitable: The quick release is suitable for roller tyre. Spindle length: Approx. 17CM. Length: The length is about 19CM. Durable: The material is stainless steel, very durable. Warranty: If there is any quality problem, you could contact us. We will offer you a solution.