The Yun SCM Heavy Duty Butyl Rubber Bicycle Inner Tube is a durable and reliable choice for cyclists riding on 700C wheels. Made from high-quality rubber and featuring a Schrader valve type, this tube is designed for longevity and easy inflation. With a valve length of 48 mm and a tube size of 35-43c, this pack includes two inner tubes in a sleek black color. Perfect for those looking for a sturdy and efficient cycling accessory.