Multi-Spool Modular Drybox for 3D Printing – Humidity and Temperature Control, PolyDryer & SnapDryer Compatible, Multi‑Color Printer Ready

Keep your filament dry, organized, and ready to print — even across four spools at once. This fully assembled modular 3D‑printed AMS‑style drybox is built for makers who want reliable humidity control, smooth filament feeding, and full compatibility with active drying systems (PolyDryer, SnapDryer) and virtually any 3D printer.

Whether you’re running a multi‑color setup like the Snapmaker U1 or a standard single‑extruder machine, this drybox feeds filament passively and works with every printer on the market.

Why makers love it
- Size XL holds up to 8 spools (0.5 kg / ~1.1 lb), 4 spools (1 kg / ~2.2 lb), 2 spools (2 kg / ~4.4 lb), or 1 large spool (3–5 kg / ~6.6–11 lb)
- Size M holds up to 6 spools (0.5 kg / ~1.1 lb), 3 spools (1 kg / ~2.2 lb), 1–2 spools (2 kg / ~4.4 lb), or 1 large spool (3–5 kg / ~6.6–11 lb)
- Real-time humidity and temperature monitoring via LCD
- Achieves <20% RH using standard desiccant
- Direct PolyDryer / SnapDryer connection for active drying with 3 heat levels (outlet temps: ~50 °C / ~60 °C / ~70 °C)
- Passive multi‑spool feeding for multi‑color printers
- Modular design – easy to repair, upgrade
- Smooth filament path to prevent tangles and drag
- Clear front windows to see filament colors at a glance

Dimensions
XL Size:
- Height: 21.5 cm (8.46 in)
- Width: 29.5 cm (11.61 in)
- Depth: 22.8 cm (8.98 in)

M Size:
- Height: 21.5 cm (8.46 in)
- Width: 22.4 cm (8.82 in)
- Depth: 22.8 cm (8.98 in)

Perfect for
- SnapDryer or PolyDryer active dryers: https://us.polymaker.com/products/polydryer?variant=44807270793273
- PLA, PETG, ABS, ASA, TPU, Nylon, PETG‑CF, and other moisture‑sensitive filaments
- Multi‑color printing setups
- Makers who want a clean, organized filament station
- Anyone tired of soggy filament, inconsistent extrusion, ugly prints

What’s included
- Fully assembled 3D‑printed drybox (multiple parts)
- Hygrometer + thermometer with batteries (humidity & temperature monitoring)
- 2 desiccant boxes (Size XL only) + printable STL for XL and M
- Connection ports to PolyDryer / SnapDryer
- Multi‑spool feed ports
- Caps, plugs, toggle latches, gaskets
- Internal spool holder rod (Size XL only) + printable STL for XL and M
- Manual describing the filament management modes: active drying (PolyDryer / SnapDryer), passive drying (desiccant), basic storage, smooth 3D printer feeding (plastic spools vs. cardboard spools) and more

Specs
- Material: PETG
- Capacity (Size XL): Holds up to 8 spools (0.5 kg / ~1.1 lb), 4 spools (1 kg / ~2.2 lb), 2 spools (2 kg / ~4.4 lb), or 1 large spool (3–5 kg / ~6.6–11 lb)
- Capacity (Size M): Holds up to 6 spools (0.5 kg / ~1.1 lb), 3 spools (1 kg / ~2.2 lb), 1–2 spools (2 kg / ~4.4 lb), or 1 large spool (3–5 kg / ~6.6–11 lb)
- Humidity: <20% RH with desiccant (PolyDryer / SnapDryer sensors show 10%!)
- Designed for long‑term durability (PolyDryer / SnapDryer active drying tested on long-term Level 3 while printing)

See it in action
I’ve created a YouTube playlist with short demo videos showing the drybox in real use — feeding 4 spools (XL) resp. 3 spools (M), connecting to SnapDryer, and multi‑color printing setups:

https://www.youtube.com/watch?v=fp6alGOTAdU&list=PLlrP8oBI0027ZY1KjkBkldP2lrrAKgADA&index=3

Handmade by a maker, for makers

This isn’t a mass‑produced plastic box — it’s a purpose‑built tool engineered for real 3D‑printing workflows. Every unit is printed, assembled, and checked with care.