TUOFENG heat shrink tubing I would recommend this product! Good value for money, at first I wasn't sure if there was glue in there, you can't see it. But on closer inspection, after I finished my wiring harness, it was there. I was expecting it to ooze out, but it's just perfectly sealed around the edges. When combined with Revain's recommended Genesis Dual-Temp heat gun, the tubing shrinks evenly and quickly. .Don't listen to the bad reviews about it, if you use a lighter expect it to burn out and go bad. It is heat shrink, not heat shrink. Don't use a hair dryer, it's the wrong temperature or airflow - you're shrinking, not drying! If you are disappointed with the sizes and colors I don't know why as I received exactly what was described in the listing and it came off well.