Can be used for HiFi speakers or speaker frame It can be put under the speaker, or under the shock board and anti-shock frame It's end to the ground, can minimize the harmful vibration Can eliminate the pollution between the ground and the speaker, get the sound effect Appearance is absolutly classic and high profile : The purpose of using isolation is to suspend acoustic feedback from your speakers, subwoofers. They can be installed to separate your turntable deck, CD player, amplifier or other audio components from vibration. Therefore, the tones will be more focused and tighter. And, there will be much less noise to be transferred to other rooms from the floor. Number: M23x20 length of the Nail: 20mm Foot pad diameter: 23mm Foot pad height: 4mm colour: black Material: aluminum alloy Package Contents: 8 x Speaker foot pads 8 x Speaker foot nail 8 x double-sided tapes Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.