Adhesive Lined Dual Wall Heatshrink Red 6mm. Length: 1.2 mtrs Shrink ratio: 3:1 When heat is applied from a heat gun or other hot air tool, the inner adhesive wall melts and flows creating an adhesive layer to ensure a strong water tight seal. Size (mm) 6/2 Inside diameter (mm) Expanded (min) 6.4 Recovered (max) 2.0 Wall thickness (mm) Recovered nom. (inner liner) 1.2 (0.65) Quantity (m) 1.2