like listening to vinyl records? have a vintage and record player in your house? , you can consider our product, a calibration disc. Under long-term use, the Phonograph Needle will inevitably have errors. Our calibration disc can help you quickly adjust the Phonograph Needle and improve your of vinyl records. Features -Color:White -Material:Acrylic -Size:8.00X8.00X0.70cm/3.14X3.14X0.28in -Made of good and sturdy acrylic material, durable, firm and nonslip for us to use. -Light and accurate, it can bring a good and wonderful calibration effect. It is a useful calibration distance gauge tool to adjust the vinyl records. -The scale on the calibration plate is clear and clear, helping you quickly identify the result of stylus offset. -You can give it to friends who to listen to vinyl records, they will love it very much -Check the slide gauge needle calibration plate at a distance. You can give it to friends who to listen to vinyl records, they will love it very much. Package list: 1 x Stroboscope Disc