Integrated Design:1) Integrated shockproof spikes and pads can make good use of the characters of brass and aluminum alloy,which advantage the elimination of vibration;2) Easier to install,no need to make holes and no need to use double-sided adhesive to avoid damaging your equipmentMaterials: Aluminum alloy: with high hardness and density has low harmonic vibration point and high damping;achieve higher quanlity of listening pleasure,improve sound ,stereo imaging and responseAdjustable Height: the height of shockproof feet spikes can be adjusted to fit different types of speakers,amplifiers,CD or DVD players,etc.Isolation feet spikes: offering an effective solution for optimizing the true sound and reduce vibration of stereo equipmentFunction: using isolation spikes is to suspend acoustic feedback from your speakers. Spikes can be installed to separate your players,amplifier or other audio components from vibration.The tones will be more focused with less noiseFeet Spikes Height: 25.5-28 mm / 1.00-1.10 inFeet Spikes Diameter: 44.5 mm / 1.75 inPads Diameter: 38 mm / 1.50 in Weight (4PCS): 300 g / 0.66 lbColour:BlackMaterial:aluminumPackage Contents:4 x shockproof feet spikes4 x shockproof feet padsOnly 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.