Audio Speaker Isolation Feet,4pcs 1.57x 0.78in Speaker Spikes Adhesive Bumper Feet Isolation Stands with Non-Slip Rubber Rings for Speakers, Subwoofers, Home Theater, Turntable DAC Feet Pad1、Aluminum Alloy Material: The speaker cone base pads use 7075 aviation all aluminum alloy, it has high hardness and high density, low harmonic vibration point and high damping. 2、Anti Slip Rubber: Absorb vibration, get higher quality listening pleasure, improve sound clarity, stereo imaging and bass response design. The rubber shock absorption round ring is directly embedded.3、Easy To Install: No need to punch holes, no need to use double sided tape; It can be installed from the inside of the case, or it can be installed from the outside of the case with self tapping screws. (with 4 screws)4、Function: To suspend the acoustic feedback from the speaker or subwoofer to isolate vibration. More concentrated, lighter, and less noisy sound. Also avoid most vibrations that would destroy the bottom layer. Specification:Item Type: Speaker Isolation Spike Stand FootMaterial: Aluminum AlloyModel: SP4010Quantity: 4pcsDiameter: Approx. 40mm / 1.57inHeight: Approx. 20mm / 0.78inInstallation Aperture: Approx. 4.5mm / 0.18inScope Of Application: For DACs, Speakers, Amplifiers, Meters, Turntables, CD/DVD Players, Recorders, and Other EquipmentPackage List:4 x Speaker Isolation Spike Stand Foot4 x ScrewNote:Manual measurement, please allow some errors.