Description: Made of durable acrylic material for long service life. High contrast alignment protractor provides improved visibility and s tracking errors. Adjust the overhang, avoid the over-shoot distortion to keep high quality sound The protractor lets an amateur do professional phono alignment. Specification: Type: Alignment Protractor Material: Acrylic Color: As the picture Size: about 15.5x3.5cm Package included: 1 x Alignment Protractor Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-3cm differences due to manual measurement.