It can be put under the speaker, or under the shock board and anti-shock frame It's end point to the ground, can minimize the harmful vibration Can eliminate the pollution between the ground and the speaker, get the sound effect The essential artifacts of audiophiles make the sound more complete and accurate, reduce the occurrence of harmonic vibration, and make the sound quality better and more comfortable. Appearance is absolutly classic and high profile. Product Name: Speaker nail Colour: Black Foot pad diameter: 23mm Foot pad height: 4mm Foot nail diameter: 23mm Foot nail height: 20mm Material: Alloy Packing include: 4x Speaker foot pads 4x Speaker foot nail Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.