Features: Engineered with double layer shock absorbing design (high elasticity silicone + aluminum alloy base) to minimize vibration distortions and preserve audiophiles grade claritys for speakers, players, and tube amplifiers. Reinforced 20mm aluminum alloy base provides 50% enhances stability standard pad, preventing shifts for heavy amplifiers and floor standing speakers Ideal for audios professionals, HiFi enthusiasts, and studio engineers seekings nonresonance sound reproduction in critical listening environment. Secure grips wood, glass, or metal surfaces in homes theaters, recording studios, and high end audios setups while protecting floor from scratches. Easy installation preserves equipment finishes with nonslip rubber contact point, featuring temperature resistant construction for long terms vibration isolation. Specifications: Component:Rubber+Aluminum Alloy; Size:Approx.20x9mm/0.78x0.35inch 3Option Color; Package Includes: 4pcs Shock Absorbing Foot Pad note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.