Features: Achieve precise cartridge alignment with our Cartridge Calibration Gauge, to enhances sound quality and protect your valuable records. Crafted from acrylic, this adjustment ruler features clear and accurate calibration for easy data reading, ensuring performances across various turntable models. Ideal for enthusiasts, audiophiles, professional, and music collector who demand the best audios experience. Perfect for home audios system tuning, recording studio equipment maintenance, and live performances preparation. This essential tool help eliminate errors, especially on inner grooves, ensuring your phonograph delivers the sound possible. Specifications: Material: Acrylic Size: About. 21x5cm/8.27x1.97in Package Includes: 1pc Cartridge Adjustment Ruler note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.