Keep track of both moisture levels and filament type at a glance with this modular rectangular hydrometer holder.

Find the circular version here: [https://makerworld.com/en/models/2139256-circular-hydrometer-base-w-swappable-id-plates#profileId-2317267](https://makerworld.com/en/models/2139256-circular-hydrometer-base-w-swappable-id-plates#profileId-2317267)

This design features a slide-in filament identification plate, allowing you to label what filament is stored in a cereal container, dry box, or other filament storage—without needing to check the spool itself. When you switch filaments, simply swap the name plate instead of reprinting the entire holder.

•  Interchangeable filament ID plates
•  Only ~12 minutes to print a new name plate
•  Ideal for cereal containers, dry boxes, and filament storage bins
•  Reuse the holder indefinitely—just change the label

The files include name plates for all of the most common filament types that I could think of. If a filament type you use isn’t included, just leave a comment and I’ll add it.

This is for the pretty standard sized rectangular hydrometer: 45x25.6 mm or 1.76x1 in (48x28 mm or 1.8x1.1 in on the outer rectangle)

[https://a.co/d/inUdGU7](https://a.co/d/inUdGU7)

A simple, clean, and efficient way to stay organized and keep your filament dry.