3:1 SHRINK RATIO - Recovers to 1/3 of its diameter, and makes a tight seal. Eliminates the problem of 2:1 tubing not shrinking tight enough.<br> GLUE INSIDE - When heat is applied, adhesive comes out and seals the connection, creating waterproof and long-lasting insulation.<br> VARIETY OF SIZES - We have included 7 most commonly used diameters ranging from 3/32inch to 3/4inch. Shrink tubing is precut to 3.5 inches.<br> EASY TO USE - Simply slide heat shrink tube over your connection point and apply heat. Professional connections made in seconds.<br> DUAL WALL TUBING - Outer wall provides abrasion resistance. Inner wall creates waterproof seal and strain relief.<br> Heat shrink ratio: 3:1<br> Operating Temperature: -55 Celsius to + 125 Celsius<br> Minimum Shrinkage Temp: 70 Celsius<br> Full Shrinkage Temp: 110Celsius maximum<br> Dielectric strength: 15 kV / mm<br> Flammability: Flame Retardant<br> When heat is applied, this wire shrink wrap tubing will recover to a 1/3 of its diameter. Its high recovery ratio makes it possible to repair most cable jackets without removing connectors. Therefore, 3:1 shrink ratio tubing can be used in significantly more applications compared to 2:1 shrink ratio tubing. Additionally, 3:1 marine heat-shrink tubing shrinks around wires and terminals more tightly, eliminating any air spaces.<br> Colour:black<br> Material:polyolefin<br> Package Contents:<br> 1 x Heat Shrink Tubing Kit (180 PCS)<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.