Ancor Heat Shrink Tubing Kit, 8 Piece Assortment The Ancor Heat Shrink Tubing Kit includes eight black heat shrink tubing sections. The Cross Linked polyolefin tubing is much stronger than PVC tubing and will not burn like PVC. Heat activated adhesive lining provides an impervious seal to salt water, oil, acids, and sunlight as well as providing strain relief. These heat shrink tubing sections have the highest shrink ratio - shrinks to 13 original size. Features Cross linked polyolefin tubing Sh