①. Materials: Aluminum alloy: featuring high hardness and density, low harmonic vibration point and high damping; Antiskid rubber: absorbing vibration, contributing to listening experience, enhancing sound clarity, stereo imaging and response. ②. Design: CNC Machined and spring isolation stand feet for easier installation, no need to make holes and no need to use double-sided adhesive to avoid damaging equipment. It is convenient to adjust load bearing by moving or adding springs which can result in different sound feelings. ③. Function: Using isolation stand feet to suspend acoustic feedback from speakers or sub-woofer isolation for vibration. The tones tend to be more focused, lighter and with less noise. It can also reduce much of the vibration that may disturb downstairs. ④. Advantages: It has high attenuation characteristics which can maintain low quantity sense and enhance high frequency line feeling and simple sense. ⑤. Applicable objects: Speakers, amplifiers, instrument, turntable, CD-DVD players, recorders, DAC and other equipments. ⑥. Specifications: Diameter: 44mm; Height: 38mm; Material: Aluminum alloy; Colour: Silver or Black; Weight load capacity of each: 7.5KG; Qty: 4Pcs/Box; Black/silver (optional). ⑦. Note: No retail package. Transition: 1cm=10mm=0.39inch. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you. ⑧. Package Include: 4 x foot pads