<p>High contrast cartridge alignment protractor improves visibility and eliminates tracking errors.</p> <p>Avoids overshoot distortion to maintain high quality sound</p> <p>Link to turntable setup guide with instructions printed directly on the protractor.</p> <p>Suitable for S-arm and any 1\/2 inch mount cartridge.</p> <p>Colour:As Shown</p> <p>Material:Acrylic</p> <p>100% Brand New, High Quality.</p> <p>Dimensions: Length 21cm\/8.27inch, Width 5cm\/1.9inch</p> <p>1. Place the protractor on the turntable plate with the hole on the spindle.</p> <p>2. Move the cartridge\/tonearm until the stylus is exactly in the center of the bullseye. Check that the cartridge is square to the outer grid lines. - If not, loosen the cartridge mounting screws and gently twist the cartridge until it is square.</p> <p>3. Move the cartridge\/tonearm until the stylus is exactly in the center of the inner bullseye, twisting the protractor as needed. Check that the cartridge is square to the inner grid lines. - If not, change the overhang (move the cartridge inward or outward along the axis) until the cartridge is square.</p> <p>4. Repeat steps 2 and 3 until the cartridge is square at both points. Tighten the mount and recheck as above. Remove the protractor. Relax and enjoy!</p> <p>Package Contents:</p> <p>1 * Vinyl cartridge calibration ruler</p> <p>1 * Magnification card</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection 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.</p>