The combination patch plugs fills and seals the injury in one step. Use the 1/8in units to seal pinhole leaks, keeping the injury as small as possible. The 1/8in unit is also acceptable for the repair of Z-rated tyres in the tread only. 1/4in units are the maximum puncture repair limit for passenger and light truck tyres. Choose any of the Patch Plug repairs for truck tyre punctures up to 3/8in. The wire tip, molded into the repair units, eliminates pull-thru wires and makes them easy to thread through the injury from inside the tyre. The stem and repair unit are coated with Dual Cure Cushion Gum creating a permanent bond to the tyre with increased adhesion compared to chemical cure repair units. Apply with Fast-Dry Cement. The proper carbide cutter reams and standardizes the injury for the installation of the Pilot Wire Patch Plug.