Heat shrink tubes by shrink ratio Heat shrinkable tubes are available in different shrinking ratios. A shrinking ratio of 3 to 1 means that the tube is delivered three times bigger than he is after complete shrinking. Heat shrink tubes with 2 to 1 shrink ratio Heat shrink tubes with 3 to 1 shrink ratio Heat shrink tubes with 4 to 1 shrink ratio Shrink ratio between 1.3 to 1 and 1.8 to 1 Display Num 5 10 15 20 50 All