This Specialized SV TR 700X20-28c Thorn Resistant 40mm Inner Bike Tube Schrader Valve is a must-have for any cyclist. It features a durable rubber material and a Presta valve type, making it compatible with most bike pumps. The stem set includes one stem and is designed for use with 28-inch wheels. The black color and sleek design of this tube make it a stylish addition to any bike. Its thorn-resistant properties ensure that it is safe from punctures and other damage. This item is perfect for those looking for a high-quality replacement or upgrade for their bike's inner tube.