The Schwalbe Air Plus inner tubes is fully recyclable, has higher air retention. Due to the high content of pure butyl rubber, the tire holds air better and is particularly robust, making you less prone to punctures. Specifications: Color: black Material: rubber Weight: 270 grams Valve: Auto valve (AV) Valve length: 40 mm Inch size: 24 x 2.10 24 x 2.80 ETRTO size: 54-507 57-507 60-507 62-507 65-507 70-507