The Corki Cycles 29 Inch Bike Bicycle Inner Tube 29 x 1.75 4-pack is a set of black inner tubes designed specifically for 29-inch wheels. Made by the brand Corki, these tubes are ideal for cyclists looking for reliable and durable components for their bicycles. With a 4-pack included, riders can easily replace worn-out or punctured tubes, ensuring a smooth and uninterrupted ride on their 29-inch wheeled bike.