2 1/4" Round 5/16" Stem Universal Quilled Combination Units BOWES TR 15030 Box of 15. This series has rubber reinforced patch heads. They are multidirectional and can be applied in any repairable area of radial or bias-ply tires (tread, shoulder, sidewall). The repair unit is black with black vulcanizing gum and both the stem and the repair unit will vulcanize chemically
effecting a perfect repair. It takes only four sizes to repair any and all types of repairable injuries (up to 1/4”) approved
by the RMA, TIA, all major tire manufacturers, and all responsible manufacturers of tire repair. The stem is equipped with a metal quill for easy installation. (For chemical vulcanization only.)