This is a high-quality butyl rubber inner tube designed for bicycles and BMX. It is available in various sizes and valve types, including American and French valves. The tube has a thickness of 0.87 mm and comes with an instruction sheet and color box packaging. Please ensure to check the size and valve type of your original inner tube before purchasing to ensure compatibility. The inner tube should only be filled within the outer tube, as overinflation can affect its service life.