PVC and Thermoplastic Rubber are poor choices for Leaf Vac Hose. They offer little to no puncture resistance. The main difficulty in selecting a Leaf Vac Hose is determining if it is made of PVC,TPR or Urethane. Listed below is a simple test to solve this problem. Locate a Medium ball point pen; avoid a fine point pen if possible. Attempt to pierce your old hose with the pen tip. An average man or woman will be able to pierce a hole in the PVC OR TPR hose with less than a 50% effort. A Urethane hose is much tougher and most likely will not pierce unless you apply "Gorilla" strength to your arm when you insert the pen. A .030 Wall Urethane hose will leave a small pimple on the inside of the hose when you apply a 70% effort to the pen insertion process. A .045 wall Urethane hose will cause the pen to break or bend when applying 100% effort. Buy the correct hose the 1st time!