Eventronic Heat Shrink Tubing Kit, 3:1 Shrink Ratio Adhesive Lined, Waterproof Maritime Heat Shrink Tube, Wire Shrink Wrap Tubing Black Red(1.75",3.5" Length)

They worked on for me, but it doesn't feel like it's really a 3:1 shrink rate. However, I don't have any calipers or professional tools to test this theory.

A wide combination of heat shrink tubing for many application . Great to have around , and was useful quite a few times already. The 3:1 ratio is ideal

As long as you heat them until the gooey stuff runs out you will be good. No complaints, worked just like they should. I think they worked slightly better with the heat gun than they did with the lighter though. It's just harder to control how much heat you're putting on them with the lighter and can burn them.

shrinkage estimate seems accurate

It is pretty good for repairs but it is quite stiff. Well I guess that could be a good thing 😀

This is the perfect set of heat shrink, works great, plenty of sizes and shrinks like crazy for a permanent seal.

Great varity of sizes, the coloring is appreciated. If you are working on a project this pack is well worth it.

From the video it seemed like it would shrink further but not quite close enough. Good product and I'm happy with it though. I'll use it on other stuff without worrying. Glue works great.