Rema Tip Top's FRU Series of repair units is a fabric reinforced series to satisfy those technicians who require additional ply support within the patch body of the repair unit. This series of universal repair units are round, non-directional units suitable for placement in the tread area of tires and can be safely used in both Bias and Radial constructed tires. The FRU repair units utilize the same BL cement as all our blue-bonding system repair units. The FRU Series of repair units should be used in conjunction with Rema Tip Top RS stem units, or cavities filled with extruder rope and vulcanized.