Vinyl Turntable Record Player Disc, Stroboscope Disc, Calibration Disc for vinyl record players, the scale is clear and precise, and the calibration results are clear . Made of acrylic, it is durable and helps you quickly adjust the Phonograph needle to the correct position. Features -Color:White -Material:Acrylic -Size:8.00X8.00X0.70cm/3.14X3.14X0.28in -Small size, convenient storage, will not occupy too much space. Calibration and speed detection for vinyl record heads. -Easy to clean, just wipe off the dust gently with a cloth. Made of acrylic, wear-resistant and durable, to meet your basic needs. -The scale is accurate and does not fade easily, so it can be used for a long time. -A perfect and professional tool, whether adjusted or used in a professional repair shop. -It is a must-have item for vinyl record and a good housewarming present for friends. Package list: 1 x Stroboscope Disc