The 2x Slime Smart Self-Sealing Bike MTB Inner Tube in 27.5 x 2.35 - 3.0 with a 48mm Presta valve is a high-quality rubber tube designed for bikes. This 2-pack set includes two tubes with a smart self-sealing formula that helps to prevent punctures and leaks. The tubes are made by the reputable brand Slime and come in a sleek black colour. With a valve length of 48mm and a weight of 312g each, these tubes are perfect for cyclists looking for reliable and long-lasting inner tubes for their 27.5-inch wheels.