This article covers Zotech 交換用 10g ウェイト + ウェイトドア Logitech G403.

Overview

The Zotech Replacement Weight 10g + Weight Door is a third-party accessory designed specifically for Logitech G403, G703, and G903 gaming mice. It serves as a drop-in replacement for the original weight and door, allowing you to restore or adjust the mouse's total weight. The kit includes a single 10g weight and a matching weight door that fits into the compartment on the underside of the mouse.
This product is not an official Logitech part but has been verified for compatibility by Zotech. It comes with a 1-year warranty and a 30-day return policy, making it a low-risk purchase for anyone who needs a spare or replacement weight.

Connectivity & Compatibility

The weight and door are compatible with Logitech G403, G703, and G903 models. These mice feature a circular weight compartment on the bottom, and the Zotech kit replicates the exact shape and dimensions of the original parts. Installation is straightforward: open the existing door, insert the weight, and close the door. No tools or adhesives are required.
Note that this product is not endorsed by Logitech. While compatibility has been tested, the G903 has a slightly different base design compared to the G403/G703, so the fit of the weight door may vary slightly between units. Always check your mouse model before purchasing.

Product Info

The Zotech weight kit is available on online retailers at a price of approximately ¥1,580 (tax included). The package contains one 10g weight and one weight door. The product carries a 1-year warranty and a 30-day money-back guarantee.
In terms of market positioning, this is an entry-level to mid-range accessory aimed at gamers who need an affordable alternative to Logitech's original weight kit (which may be discontinued or expensive). It offers a practical solution for weight tuning without breaking the bank.

Best Use Cases

  • Users who lost their original weight: If you've misplaced the weight or door from your G403, G703, or G903, this kit provides a cost-effective replacement that restores the original weight balance.
  • Gamers who prefer a heavier mouse: Adding 10g can improve stability and control, especially in FPS or precision games. However, if you prefer a lightweight mouse, this product is not for you.
  • Those who want a spare weight: If you frequently swap between different weight configurations or own multiple compatible mice, having an extra weight on hand is convenient.
    This product is not suitable for users of other mouse brands or models, nor for those who insist on genuine Logitech parts. It also only offers a single 10g weight; if you need different weights (e.g., 5g or 20g), you'll need to look elsewhere.