Can be used in conjunction with adjustable spikes to stabilise, isolate turntables. Speakers Spikes, Conical shape, 20mm in diameter 12mm tall with self adhesive doublesided pads BIG Black Aluminium Speaker Spikes M6 L37mm Red Knurled Speaker Pads... They are 20mm diameter and 8mm thick. Speaker spikes isolation pads are solid aluminium with a machine fine finish, anodised to grey. PrecisionGeek M6 Speaker Spikes with 20mm Isolation Pads PrecisionGeek - Speakers Spikes and Pads Set, Grey Anodised Aluminium, Conical spikes 20mm diameter, Pads Chamfered Shape 20mm diameter, self adhisived included for HiFi Systems, Cabinets, Soundbars Prevent damage to wood, laminate flooring. Thanks to speakers set you get excellent bass performance. Items are made of quality aluminium anodised to grey 20mm Diameter Spikes PrecisionGeek - Speakers Spikes And Pads Set, Grey Anodised Aluminium Conical Spikes 20mm Diameter Pads Chamfered Shape 20mm Diameter Self Adhisived Included For Hifi Systems Cabinets Soundbars Isolation Feet CNC Machined to fine finish with grey anodised effect