This is a record player stabilizer for LP turntables. It prevents record warping and reduces vibrations at a stable rotational speed. Perfect for maintaining stability and improving sound quality. To eliminate vibrations, stabilize the rotational speed, and keep the turntable level. Lifelike sound reproduction and lower noise give you a clean and flawless musical experience. The spindle hole is compatible with 7mm diameter spindles, making it perfect for most existing turntables. The built-in high-precision spirit level is used to test if the workbench is level and shows the record's rotational speed. This product only includes the LP turntable stabilizer and does not include other accessories shown in the demonstration. Used for record stabilization. Testing of the turntable's rotational speed. Testing the level of the turntable, cabinet, and speakers. Color: Black Material: Aluminum alloy Dimensions: Hole diameter: 7 mm/0.28 inches Maximum diameter: 76 mm/2.99 inches Height: 34 mm/1.34 inches Package contents: 1 x 50Hz LP turntable stabilizer Only the above package content is included; other items are not included. Note: Light reflections and different monitors may cause the color of the item in the picture to differ slightly from the actual product. The allowed measurement error is +/- 1-3 cm.