This is a box of 50 UP-6 Rema universal tire patch repair units. REMA TIP TOP's rubber-reinforced, Universal repair units are specially formulated to provide maximum flexibility and strength. These non-directional, center over injury repair units perform flawlessly in both radial or bias-ply tire designs. For best results, always select the corresponding Rema Tip Top stem insert unit, carbide cutter and Special Blue Cement (BL8-F or BL32-F) for a permanent, reliable repair.