Prema PR-109 | Passenger & Truck Radial Tire Repair Patch 3" x 2" - Choose SizePrema PR 109 Passenger & Truck Radial Tire Repair Patch 3" x 2" PR 109 PREMA Center Over Injury Repairs are designed for use in the Crown, Shoulder and Sidewall area of radial tires. They can be installed by either Chemical (COLD) vulcanization or Heat & Pressure (HOT) methods. For COLD application, install using PREMA Ultra Fast Dry Vulcanizing Cement. Specifications: Patch Size: 3" x 2" (77mm x 50mm) Number of Plies: 1 Ply Patches Per Box: 20