Thank you for viewing. Record Player audio-technica / Audio-Technica For AT-1503 / AT-1503Ⅱ This is an auction for a 51g (1 piece) custom-made sub-weight. ※ The main weight and scale in the images are not included. ◆ Size: See image. Inner diameter matches the outer diameter of the main weight. Outer diameter: approx. 37mm, Width: approx. 12mm ◆ Materials Sub-weight: SUS304 Anti-rotation: Brass (3604) ※ Brass screw with a flat tip, gentle on the shaft. ※ Easy-to-use minus screw. ※ Non-magnetic materials suitable for audio are used. ◆ Condition: See image. Due to being a custom-made product, there may be lathe marks and chuck scratches. Please understand. ◆ How to use When the cartridge + shell weight is heavy and zero balance cannot be achieved, attach it over the main weight to balance. Check the stylus pressure with a precision scale. ※ This item expands the options for cartridges and shells. ※ Zero balance is not always guaranteed. ◆ Included items Sub-weight, anti-rotation (M4 screw) With protective tape ※ Please ask questions for more details. If you have requests for different sizes or weights for the custom-made weight, please ask. If you are having trouble because you don't have a sub-weight, please take this opportunity to try it.