SPECIFICATION - Material: Alumiunm alloy; Size: Max OD44.5mm x Total Hight 33mm; Spring Material: High Quality 65Mn; Each Weight: 65g; Qty: 4 | SUPERB CRAFTSMANSHIP - Preffair speaker isolation spike is made of high quality aluminium alloy with high hardness and density has low harmonic vibration point and high damping, manage the energy of the speaker to reduce vibrations resonating through the supporting surface and internal reflection to eliminate dissonant sound. | EXCELLENT EXPERIENCE - Speaker bumper feet isolation can separate audio component from vibration, antiskid rubber absorbing vibration, resulting in tighter and cleaner sounding bass, less buzz in the room, fewer complaint from neighbor in apartment. | WIDELY APPLICATION - Preffair speaker stand feet vibration absorbe has high attenuation characteristics which can keep low quantity sense and raise high frequency line feeling and simple sense, ideal for speaker, amplifier, instrument, turntable, CD/DVD player, recorder, DAC etc. | PACKAGE CONTENT - Aluminum Alloy Shockproof Stand Feet Vibration Absorber x 4, Please feel free to contact us if you have any question before or after purchasing.