Prema Centre-Over-Injury Radial Repair Unit #109 for Passenger and Truck • Designed for Use in the Crown, Shoulder and Sidewall Area of Radial Tires • Can Be Installed by Either Chemical (COLD) Vulcanization or Heat and Pressure (HOT) Methods — for COLD Application, Install Using PREMA Ultra Fast Dry Vulcanizing Cement • Size: W 2" x L 3" • Ply 1 • Qty / Box 20