Thanks to my knowledge gained in practice I know that a good shrinkage ratio is important when working with electrical wiring. This heat shrink tubing has a ratio that provided a secure and professional finish to my latest industrial electrical job. The ease of use and durability of the product were both positives, but the only downside was that it was a bit pricey compared to other options on the market .Overall, i highly recommend this PRODUCT for anyone working on industrial and scientific electrical projects..