Ensure your semi truck is Ready for the Road Ahead™ with reliable tires, with the X-tra Seal 8" Universal String-Type Tire Repair Plug Inserts. By utilizing a strand-like substance, this replacement tool is able to block punctures or holes to act as a temporary fix for tires. Crafted with an easy-to-use design for use in radial and bias ply tires. FleetPride is your First Click in Heavy Duty®.