DEI Hi-Temp Shrink Tube 18mm x 1.5in - Gray - 10800 Perfect for sealing spark plug wires to boots at each end forming a water-tight weatherproof seal. With a 3 to 1 shrink ratio, shrink tubes can be used to bundle wires as an alternative to tape or plastic ties. 3:1 shrink ratio Offers a clean &... MSRP: $20.66 Was: Now: $13.83 Add to Cart