Noisekiller. Thus all Hi-Fi component are decoupled against low-frequency oscillations. Particularly boxes or record players. Resonances and feedbacks are destroyed by the points of the absorbers. Set consisting of 4 Decouplers with 2-sided adhesive felt. Hight adjustment by fine threads. Handturned and bright-polished. 4 Grommets to turning the spikes off. Measures: Diameter 25mm, height adjustably of 22-24mm.