REMA TIP TOPs pre-cured, self-vulcanizing Stem Inserts with wire leads are specially contoured for easy installation. These units fill the tire injury hole and are the perfect solution for tire injuries that are at an angle. For best results always select the corresponding REMA TIP TOP repair unit, carbide cutter and Special Blue Cement (BL-8F) for a permanent, reliable repair. Compatible for use in hot or cold vulcanization processes.