Features:Isolate the speaker vibrations from speaker to the floor better,best on hard flooring.Regardless of the level of speakers keeping them relatively immobile is a good thing for the tightness of the bass response.Made of plastic and foam material.Think size makes it ripping off hardly.It is easy to use, just pulling the drivers from the speakers to drill the holes and place the t-nuts.Suitable for HiFi speaker, amplifier, subwoofer.Specification:Material : Plastic and FoamDiameter : 30mm / 1.18"Small Hole Diameter : 5mm/0.2"Big Hole Diameter : 10mm/0.39"Height : 8mm /0.59"Color : Silver TonePackage Content:8 x Plastic Feet.
eBay