Features: Brand new and high quality For optimal connection of disc to turntable. Platter significantly lowers noise level. Eliminates resonances and reduces distortion and end-of-side distortion. Provides clean signal retrieval. Delivers realistic sound reproduction. Enhances stereo imaging and focus. Separates instruments and groups of instruments. Less record wear as a lower downforce is possible. For music lovers, analog fan and advanced adept. Provides improved signal when burning quality CDs from for LP. Velocimetry Method: Above for LP turntable bock is used for Velocimetry, for LP turntable marked 50-33 / 50-45, such as turn 33 for LP record jukebox after turning up to see if the bock markings 50-33 clearly visible. If the rotation speed is uniform and clear, it proved to be normal speed for 33 rpm (or so). If it is more obscure or connected into a line, the speed is not correct. Specification: Dimensions: As shown pictures. (Approx.) Top diameter: 65 mm (2.56 inches) Bottom diameter: 78 mm (3.07 inches) Hole shaft diameter: 7 mm (0.28 inches) Color: silver, black Quantity: 1 pc Note: Transition: 1 cm = 10 mm = 0.39 inches With retail package. 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!