Tru-Flate 14-137 Tire Patch Tru-Flate Radial Tire Repair Patch Kits ensure the repair gets done right - patching is always the safest way to repair a punctured tire For use with radial tires only - do not use on bias ply tires When patching a tire, always prep the surface with a liquid buffer/cleaner then rough up the surface with a manual or rotary buffer; a thoroughly prepared surface ensures patch adhesion and safety 2-1/4 inch round patches Box of 30 patches