and . Feature: Made of high-quality acrylic material, durable, firm and nonslip for 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 . Side A is used to test the skidding force of stylus, Side B is used to calibrate the head. LP Vinyl Pickup Calibration only, other accessories demo in the picture is not included Item Type: LP Vinyl Pickup Calibration Material: Acrylic color: white Thickness: 2mm or 0.07in Speeds: 33,45,78 RPM Model Number: Calibration Plate Output Connectors: RCA Stylus Type: other Motor: None Dimensions (W x H x D): 295mm or 11.6in Diameter Package Contents: 1 x LP Vinyl Pickup Calibration Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.