Feature●Premium Quality: The bike tube is made from premium butyl rubber material. It features better sealing performance, ozone resistant, anti-aging, shock absorption and electrical insulation merits, durable for long lasting.Description 16 x 1.75/1.95/2.15 Kid’s Bike Replacement Tubes, suitable for most kid’s bikes on the market with 16” tires that are between 1.75” to 2.15” wide.