SVS sound path Einschraubbare isolation: The feet, Entkoppeln and insulation the subwoofer and generate a toned, clean sounding bass, less Buzz & rattling balls of objects in the room. Designed by heavy acoustic measurements, optimised by Härtegeprüften natural rubber, this system the floor vibrations can reduce significantly. The sound path subwoofer insulation system is also available in packages of (4) four or (6) six feet with three any thread sizes in different lengths, for a wide range of Subwoofern, independent of the brand. Material: durable anodized steel for the outer trim & optimal hardened rubber foot; Steel Thread Screws, insulation feet - Dimensions: Total Height: 40 mm; Total Diameter 58 mm, base diameter 53 mm Box contents: each pack has 4 System Set, four (4) ¼ - 20 x 20 mm - Screws, four (4) screw M6 x 20 mm; four (4) M8 x 20 mm Screws