We produce 2:1, 3:1,4:1 and 6:1 shrinking tubes, so tubes can shrink by 2 times, 3 times, 4 time or 6 times small of their as supply ID,unless the covered cable OD is pretty large, the tube can't be fully shrinked.
What is heat shrink tubing
Heat shrink tubing is a shrinkable plastic tube used for wire and cable insulation, providing abrasion resistance and environmental protection for stranded and solid wire conductors, connections, joints and terminals, It can also be used to repair the insulation on wires or to bundle them together,to protect wires or small parts from minor abrasion, and to create cable entry seals, offering environmental sealing protection. Heat shrink tubing is ordinarily made by polyolefin, Viton, DR, Kynar,etc. tubes shrinking radially (but not longitudinally) when heated, after shrinking ID will be between one-half and one-sixth of its as supply diameter.