Feature: d new and .Made of acrylic material, durable, firm and nonip 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.Side A is used to test the skidding force of stylus, Side B is used to calibrate the head.Easy to use, one sided alignment mat provides a diagram for alignment.Specificatins:Item Type: LP Vinyl Pickup CalibrationMaterial: AcrylicSize: Diameter: 295mm/11.6in, Thickness: 2mm/0.07inColor: WhitePackage Includes:1 x LP Vinyl Pickup CalibrationNote:Transition: 1cm=10mm=0.39inchPlease allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid." Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.