5/16 inch Mushroom Style Orange Tire Plug Insert Box of 25

5/16 inch Mushroom Style Orange Tire Plug Insert BOWES TR 37211 Box of 25. These inserts are designed to “fill the injury” in passenger or truck, radial or bias-ply tires. While TR-12234 and TR-12239 are temporary repairs sealing by compression only, TR-12213 and TR-12214 are coated with a special orange vulcanizing gum to ensure a fully vulcanized repair either chemically or in a heat curing system.