A tiny removable weight plate is tucked into the mounting bracket for use with standard tonearms. You can remove it if you want a low-mass tonearm, reducing the weight of the cartridge to a mere 2.5g. Made from NORYL (a plastic and glass compound), the Super OM 5E enclosure is lightweight and ensures high rigidity with freedom from resonance. Its computer-modeled design improves linearity, leads to higher channel separation, and reduces distortion.