Features: High definition, high transparency, easy to use Purpose: Adjust the azimuth of LP vinyl phonograph and VTA balance of tone arm Usage: Adjusting the azimuth – move the tone arm to the middle of the record, lower the arm, and allow the stylus to rest on the record. Place the adjusting ruler in front of the tone arm to check if the stylus aligns with the vertical line in the center of the grid, and whether the outer contour of the tone arm aligns with the grid line (for tone arms with irregular contours, estimate alignment and ensure uniform proportion) How to use for VTA balance of tone arm: Move the tone arm to the middle of the record, lower the arm, and let the stylus rest on the record. Place the adjusting ruler on the side of the arm to check if the arm is parallel to the horizontal line of the ruler. If not, adjust VTA (adjust the height of the arm) Color: Transparent + Green Material: Acrylic Package Contents: 1 x Tone Arm VTA Alignment Block Note: Light reflection and different displays may cause slight color variations between the item and the image. Measurement may vary by +/- 1-3 cm.