Perfect for workshop, repair garage or inside your tool boxDouble tin ring, twice the sealing and water resistant performance provide perfect seal for all applicationsFour sizes, Duraflex double ring heat shrink terminal: white, red, blue, yellowSuitable for agricultural, earth moving equipment and automotive applicationsShrinkage Ratio: 2:1Operating temperature: -67°F - 257°FShrink temperature: 176°FSolder melt temperature: 280°F