Michelin Airstop D3 inner tube This Michelin bicycle inner tube is made of butyl. Butyl is a very elastic and at the same time airtight synthetic rubber. Due to its high elasticity, the Michelin inner tube is suitable for covering a wide variety of tire sizes. Specifications: Color: black Gender: unisex Material: rubber Inch size: 24 Valve type: French valve Valve length: 26 mm Maximum valve pressure: 15 bar Weight: 160 grams Suitable for inch size: 24 x 1.20 24 x 1 3/8 24 x 1 3/8 x 1 1/4 24 x 1 3/8 x 1 1/4 NL Suitable for ETRTO size: 30-540 32-540 37-540 28-541 32-541 37-541 Suitable for French size: 600 x 28A 600 x 32A 600 x 35A