This worked great for the 6 cell 18650 batteries I made. I recommend using a heat gun to shrink.(Flame is too much heat in a small area) The only downside to the material is that it was difficult to get it flat and smooth with no wrinkles.But I could just use a using poor engineering. So why the 1 star rating? The title says "Length 5m" anywhere in the world. 5m means 5 meters (or 16.4042 feet). About 1.8m. So fix, add or send me 10 more feet of heat shrink tubing and it will be a 5 star rating.