The KEX KX-4102-1 Universal Tire Repair Patches are medium round 2-1/4 inch (57mm) patches designed for permanent puncture repairs in radial and bias ply tubeless tires. Reinforced with rubber for added strength, they are suitable for a wide range of vehicles including cars, trucks, ATVs, and farm equipment. For proper installation, the injury channel must be filled with an appropriate stem repair material and the patch must be applied using chemical vulcanizing cement. The 100 count box is ideal for professional tire shops and high volume service operations.