brand new and high quality. Feature: This is a great record stabilizer for LP record player, which will efficiently keep the disc from shaking and reducing vibration with stabilizing rotational speed. Perfect for maintaining stability, and improving acoustic quality. For eliminating vibration, stabilizing rotational speed, and maintaining horizontal level of turntable. Realistic sound reproduction and lower noise provide you a pure and excellent enjoyment in music. Spindle hole is suitable for 7mm diameter of spindle, fit well with most of exist turntable. Built-in high precision bubble level, for testing weather the working surface is on the level and showing you the rotation speed of the vinyl disc. Record Stabilizer only, other accessories demo in the picture is not included Velocimetry method: Above for LP Turntable tick is used to Velocimetry the, for LP Turntable marked 60-33 / 60-45, such as turn 33 for LP disc jukebox after turning up to see whether the tick marks 60-33 clearly visible, if the rotational speed uniform and clearly visible, proved normal speed for 33 revolutions per minute (or so), if more obscure or connected into a line, that speed is not correct. Note: Suitable for use in areas with a power frequency of 60HZ Function: 1.For record stabilizer. 2.To test the speed of record players. 3.To test the level of record player, cabinet and speaker. Specifications: Item Type: Record Stabilizer Frequency: 60Hz, Material: Aluminum Alloy Size: Top Diameter: 65mm/2.56in, Bottom Diameter: 78mm/3.07in, Hole Axis Diameter: 7mm/0.28in Color: Silver, Gold, Black(Optional) Quantity: 1 Pc Speed measurement method: Firstly, the record is pressed to the turntable of the record player, and the record player is turned on. After the record player rotates, it looks down under the fluorescent light to see if the tick mark is clearly visible. If the point on the tick mark line is evenly and clearly visible, it does not move left or right, then the rotate speed is accurate. If it is fuzzy or connected into a piece, and move left and right, then the speed is not normal. This test method is for reference only. Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 1 x Record Stabilizer