This is a high-quality Schwalbe SV3 inner tube, renowned for its durability and reliability in cycling accessories. It is designed to fit 16 x 1.75 to 16 x 2.50-inch tires, offering compatibility with a variety of bike types. The tube is equipped with a 40mm Presta valve, ensuring easy inflation and compatibility with most bike pumps. All Schwalbe inner tubes are 100% recyclable and are inflated and tested for leaks at the factory before shipping. They feature a high butyl content and high material purity. The SV designation indicates a Presta valve.