SUNLU Official Filament Dryer S4, 4-Spool Filament Storage Box with Auto Humidity Control, 350W PTC Fast Heating, 70℃ Max Temperature for 3D Printer Filament, S4 Black
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Availability:
Only 8 left in stock, order soon!
Arrives
Monday, Apr 27
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Features
- 1Large Space for Endless PrintingExperience uninterrupted 3D printing with SUNLU New S4 Filadryer the first filament dryer box that effortlessly handles 4 spools 1KG 3D Printer Filament simultaneously.With the new generation filament drying box, we can embrace the freedom of multi-color and multi-machine 3d printing.
- 2Updraded Lightning-Fast HeatingGet to heating quicker with the S4 filament dry box's impressive 350W PTC heater. In just 30 minutes, it heats up from 25C to 50C, ensuring 50% faster and more efficient heating than other filament dryer box in the market. Efficiency meets speed for a next-generation 3d printing experience.
- 3Triple Security for Worry-free PrintingRest easy knowing the S4 filament storage box prioritizes your safety. Its triple-layer security PTC, temperature switch, and software protection keeps a vigilant eye on temperatures, ensuring a worry-free 3d printing environment with real-time alerts for any unexpected changes.
- 4Triple Fans for Uniform DryingSUNLU New generation S4 filament dehydratorr equipped with three build-in fans two circulating fans on the sides and 1 on the bottom. It maintains a temperature balance inside the box within 3C, guaranteeing optimal drying for every section of the filament. Efficiently rescue your wet filaments.
- 5Smart Auto Humidity Control3D printing users can adjust the internal humidity by mode 2(humidity range 30%~50%). The S4 dryer will auto start drying when humidity hits your desired range, ensuring your filament stays dry. And will stop drying when humidity below 25%, catering to avoid excessive drying of the filament.
- 6Universal CompatibilityCompatible with all FDM 3D printers, the S4 filament dryer supports connection to 4 printers simultaneously, accommodating 99.99% of filaments in the market. SUNLU has over 10 years of experience in the 3D printing industry and a professional after-sales team to make your printing worry-free.
Brand: SUNLU
Color: Black
Special Feature: Handles 4 spools simultaneously, Fast Heating, Triple Security, Auto Humidity Control
Unit Count: 4.0 Count
Manufacturer: SUNLU
Manufacturer: SUNLU
Brand: SUNLU
Item Weight: 11.48 pounds
Package Dimensions: 20.2 x 13.8 x 11.1 inches
Item model number: S4 Filament Dryer
Color: Black
Number of Items: 1
Manufacturer Part Number: Official Filament Dryer S4
Date First Available: June 25, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Apr 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
After 3-D printing for over a year, I started experiencing problems with stringing. Sure enough, my filament was wet and I needed a dryer and I needed it fast. I bought this SUNLU dryer and I could not believe how good my printing was immediately after the first print of drawing like filament. Do you have preprogram filament drying settings. This unit is so easy to use and I highly recommend it.
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Reviewed in the United States on November 21, 2025 by Steven F. Steven F.
Color: Black
Works great. I mostly run at 70C for carbon fiber filaments. Auto mode from 30% humidity to 25% humidity runs for about 10 minutes 2-3 times a day. Keeps everything warm and dry.
Reviewed in the United States on February 11, 2026 by Cody B.
Color: Black
This is awesome. Drying and printing through the dryer worked perfectly.
Reviewed in the United States on January 28, 2026 by Corey
Color: Black
Awesome I love it I bought two Keep filament nice dry Feed two A1s
Reviewed in the United States on February 18, 2026 by Jay Jay
Color: Black
It works great.And I love that I can set it to dry and then set it as mode too.So when it's done anytime, the humidity rises, it'll turn back on and keep it dry.As long as I leave my filament in and it plugged in and it even gets hot enough to do nylon
Reviewed in the United States on January 24, 2026 by Forrest Barton
Color: Black
Great dryer. The top is not intended to be removed. It would have been perfect if I could remove and modify the lid.
Reviewed in the United States on November 6, 2025 by BGreenAERO
Color: Black
This purchase was exactly what I wanted. I have a Bambu Lab P1S with a AMS 2. I like the ability to dry my filament at the same time as printing. This works great and easy to setup.
Reviewed in the United States on December 8, 2025 by Don Gonzales
Color: Black
This works great for me as an independent filament dryer as well as a feeder for filaments that aren’t compatible with an AMS.
Reviewed in the United States on March 6, 2026 by Amazon Customer