The Goodyear 26" Self-Sealing Bike Tube is made of durable butyl rubber, designed specifically for mountain biking. With a size of 26 x 1.75-2.127 inches and a weight of 0.75 pounds, this tube is suitable for most mountain bikes. The black tube features a Schrader valve for easy inflation and is imported from the manufacturer. Perfect for avid riders looking for a reliable and high-quality inner tube for their biking adventures.