[Improve the sound quality] Installed under the spikes on the floor speaker, it can the hardwood or tile floor from being scratched and , 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: 16 x shoes feet 16 x Slip mat 16 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.