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Prusa Research · UK product support

Prusa USS Drybox

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

Prusa USS Drybox1 / 10

Prusa USS Drybox

1 / 10

£31.99

SKU PRUSA-3939-0

Ships in 2 weeks. We place your order with the manufacturer straight away and send tracking when it is dispatched.

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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. 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 · 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.

Close up of the sealed filament output slot

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.

Drybox mounted on a standard 3D printer spool holder

Universal Mounting

The central opening fits the Prusa bayonet spool holder. Its close-fitting layout reduces the amount of air enclosed around the spool.

Multiple dryboxes stacked vertically

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.

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Buying questions

Which Prusa USS Drybox 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.