This Schwalbe inner tube is a replacement inner tube for a bicycle tire. It is made of high-quality rubber and has a Presta valve stem, which is a type of valve stem commonly used on high-pressure bicycle tires. The inner tube is designed to fit a 24-inch wheel and has a width of 100 millimeters. It is suitable for use with a range of tire sizes and is suitable for both road and off-road use. This inner tube is a reliable and durable option for maintaining or repairing your bicycle tires.