This is an excellent record stabilizer for LP record players. It can prevent the record from shaking and reduce vibration at a stable speed. perfect for maintaining stability and improving sound quality. In order to eliminate vibration, please stabilize the speed and maintain the horizontal position of the turntable. Realistic sound reproduction and lower noise bring you pure and outstanding music enjoyment. The spindle hole is suitable for a spindle with a diameter of 7mm, which is very suitable for most existing turntables. The built-in high-precision bubble level is used to test the weather, the work surface is on the level, and it shows you the rotation speed of the vinyl record. Only LP recording stabilizer, excluding other accessory demonstrations in the picture. Used to record stabilizer. Test the speed of the recording player. Test the level of the record player, cabinet and speakers. Colour:Bright black Material:Aluminum alloy Size: Hole shaft diameter: 7 mm/0.28 inch Maximum diameter: 76 mm / 2.99 inches Height: 34 mm/1.34 inches Package Contents: 1 x 50Hz LP Disc Stabilizer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.