Feature:1. Aluminum alloy material has high hardness, high density, low harmonic vibration point and high damping.2. Nonslip rubber can absorb vibration and improve sound clarity, and get better listening pleasure.3. CNC machining and spring isolation bracket feet are easy to install, no need to punch holes, and no need to use doublesided adhesives to avoid damage.4. Use isolation feet to suspend the acoustic feedback of speakers to reduce vibration. The sound will be more concentrated, lighter and less noisy.5. Seven removable stainless steel springs, which can effectively reduce vibration, increase the energy of low and medium frequencies while maintaining the original rich details.Specification:Item Type: Speaker Spring Feet PadModel: SP4540Base Material: Aluminum Alloy + RubberSpring Material: 304 Stainless SteelSingle Weight: Approx. 108g/3.8ozDiameter: 49mm/1.9inHeight: 42mm/1.6in (No Load Bearing)Load-bearing Range: Within 35kg/1234.6ozScope of Application: Speakers, Amplifiers, Musical Instruments, Turntables, CD/DVD Players, Recorders, DACs and Other Equipment.Package List:4 x Speaker Spring Feet PadNote:The product only has spring‑loaded feet and does not include audio.