Muy buena calidad y muy útiles

Ces rondelles sont très efficaces et améliorent le son. Je recommande.

I like to always use these to prevent metal on metal.

Secondo me sono molto meglio di quelle di metallo. Da provare.

The plastic tension rid holder plastic rings were ok. It seems that some are of smaller diameter than others. Some fit just right on the rods, some are too tight. I had ordered the same product from another vendor, and I had liked their product better. This vendor also took longer to ship. The previous vendor had a faster delivery service. The only reason I didn't ordered from the first vendor was the fact that I couldn't remember their name. The rings still worked ok, but not as good as my first order.