[Improve the sound quality] Installed under the spikes on the floor speaker, it can protect the hardwood or tile floor from being scratched and damaged, while allowing the spikes to separate the speaker box from the floor, thereby improving the overall sound quality. [Balance] Designed with highly-adjustable balance nuts. Suitable for speakers, amplifiers, CD DVD players, turntable recorders, cases, musical instruments, etc. has better effect, high-grade electroplating, beautiful, bright, and not easy to be scratched. [Loading] Load capacity of 4 studs is approximately 100 pounds (45kg) Function: colour:Gold Material:Aluminum alloy size:Feet height: 25MM Foot nail diameter: 28MM Non-slip stickers: 3MM Package Contents: 4 x shoes feet 4 x Slip mat 4 x double-sided tape 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.