Description: Material: Golden Plated Brass Copper Zinc Alloy,The tones will be more focused. And less noise Using isolation spikes is to suspend acoustic feedback from your speakers,Spikes can be installed to separate your players, amplifier or other audio components from vibration. These well-crafted and attractive little devices are useful for a variety of applications. Placed under the spikes that can be fitted to floor-standing loudspeakers, they can protect hardwood or tile floors from being scratched and damaged, while simultaneously allowing the spikes to decouple the speaker cabinet from the floor, improving overall sound quality. Especially designed for carpeted floors, where penetrating the weave of the carpet and reaching the plywood subfloor, spikes also contribute to improved sound quality on other surfaces, too by keeping any cabinet resonance from "exciting" the floor and creating a "boomy" sound. Specification: Product diameter: Spike-28mm base-25mm Product height :Spike-(adjustable): 28mm - 32mm base-3mm Package Includes: 1 Piece spike 1 Piece base 1 Piece sticker