ITEM NAME:4Piece Aluminum Speaker Isolation Feet Pad for AMP Turntable HIFI Player Description: Diameter:50mm. Height:15mm. Material: Solid Aluminum CNC Machined. Mounting Screw Hole Diameter:4.5mm. Suitable for most of pointed spikes, Hi-Fi, speakers, turntables, computers, printers and other sensitive equipment. Package Includes: 4 Pieces Speaker Isolation Feet Pad SKU: DMO0014031868008079.4 Pieces Speaker Isolation Feet Pad. Material: Solid Aluminum CNC Machined. SKU: DMO0014031868008079.