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Prusa Research · UK product support
Prusa USS Drybox with spool holder
When wet filament hits the hot nozzle, the water inside instantly boils, expanding in volume.
Prusa Research 4.5/5 on Trustpilot (opens in a new tab)company reviews, not this product
1 / 11£35.99
SKU PRUSA-3940-0
Contact us for availability and delivery information.
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1
95% less moisture absorption
vs. ambient air
5× more airtight
vs. generic dryboxes, on par with Museum-Grade Sealing
50% better sealing
vs. generic dryboxes
Stable for weeks
10% Relative humidity when using 50g silica gel
Prusa USS Drybox with spool holder. Prusa USS Drybox. When wet filament hits the hot nozzle, the water inside instantly boils, expanding in volume.
Features & product detailsExplore the design, capabilities and setup information.
A closer look
Prusa USS Drybox with spool holder · Technical features from Prusa Research.
Wet filament = ruined prints
When wet filament hits the hot nozzle, the water inside instantly boils, expanding in volume. This creates steam bubbles that pop out of the nozzle, leading to stringing, oozing, and rough finish instead of smooth walls.
Never deal with wet filament again.
The Prusa USS Drybox is designed for filament storage and printing directly from the container. Put the spool inside, route the filament and leave it enclosed between prints.
Unique quick access port
Access and load your filament without opening the lid. The sealed port keeps moisture out while you print, and it fits a PTFE tube perfectly for direct connection.
Universal Mounting
The central opening fits the Prusa bayonet spool holder. Its close-fitting layout reduces the amount of air enclosed around the spool.
Stackable Design
The flat sides make the boxes fully stackable for neat organization. One box per spool: place it inside once, and leave it there until the roll is empty.
Fits the vast majority of spools
The drybox accommodates standard spools up to 1 kg as well as smaller specialty spools. Check the listed dimensions against your spool before ordering.
Moisture Absorption Over Time
Meassured with Prusament PCCF filament, without any silica gel in the box.
Useful features
of the Prusa USS Drybox
Integrated Sensor
Always know the exact conditions inside. Built-in hygrometer and thermometer for easy monitoring (°C/°F).
Label Holder
Identify your materials easily with included tear-off labels or 3D print your own custom tags, using a template from Printables.com.
Smart Side Access
Small side covers let you manually rotate the spool or replace silica gel without opening the whole box.
Frequently asked questionsAnswers to common questions about this product.
Which spoolholders are supported?
The drybox mounts directly on the bayonet spool holders used by CORE One+ and CORE One L. Other listed Prusa models require an appropriate adapter. Confirm that the correct adapter is available for your machine before ordering.
Can I print directly from it?
Yes. The sealed PTFE exit port allows your printer to pull filament with low friction while keeping the internal environment airtight.
Does it come with desiccant?
Yes, It includes 50g of silica gel, which maintains 10% relative humidity (RH) for weeks at a time.
Will this work with my non-Prusa printer?
You can feed filament directly from the box to any 3D printer. Attaching the drybox on the printer will work with compatible spoolholders, such as those on Prusa 3D printers (spoolholder with bayonet lock system), or any community made spoolholders for other printers.
A question before you order?
Ask about compatibility, the right configuration, or delivery for this product.
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Buying questions
Which Prusa USS Drybox with spool holder options can I order?
The available configuration, its current price and stock status are shown above. Check the supplied items before ordering.
Are the displayed prices inclusive of VAT?
Yes. Storefront prices are shown in GBP including VAT. Available delivery services and charges are shown at checkout before payment.
How can I check compatibility?
Check the exact model, dimensions and interface listed in the specifications and supplied-items information. A shared brand alone does not establish compatibility. Contact Fabinity if your model is not listed.