These medium round repair units are engineered to deliver a reliable and long-lasting fix for inner tube punctures. Designed to be twice as strong as the tube being repaired, they provide dependable reinforcement while maintaining flexibility to ensure proper tube performance. Each patch features a feather-edge design that blends smoothly with the tube surface, reducing the risk of chafing and ensuring a secure bond. Intended for use with chemical vulcanization, they incorporate black vulcanizing gum with a white poly backing for consistent adhesion and durability. Gray vulcanizing gum with blue poly backing options are also available. Ideal for automotive, agricultural, and industrial inner tube repairs, these patches make quick, professional-quality fixes straightforward and effective. For best results, always buttonhole the ends of the injury and select a repair unit at least twice the size of the damaged area. Packaged in a convenient 30-count box for shop or field use.