Features: Built-in high precision bubble level to test the speed and keep the balance of turntable, cabinet and speaker, allowing you to enjoy the best sound quality. Equipped with non-slip cotton pad, shock absorption, can reduce the friction between the metal and the record, not easy to damage the recorder. Made of aluminum alloy material, which can effectively keep the discs from shaking and reduce vibration. Suitable for vinyl record players, for LP record players, phonographs, stereo record players. Comapct and lightweight, easy to carry. Specifications: Material: Aluminum Alloy Maximum Diameter: Approx. 79mm/3.11in Height: Approx. 30mm/1.18in Hole Diameter: Approx. 7mm/0.27in Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 Piece Disc Stabilizer