40 Gram Pack of 4 Silica Gel Canister, Gun Safe Dehumidifiers (Orange to Green), Reusable Desiccant Moisture Absorber for Car, Closet

I bought the Wisesorb 40 Gram Silica Gel Canisters to use in my Kobra S1 ACE Pro filament dryer, and they’ve worked perfectly. They keep the humidity under 39% most of the time, which makes a huge difference in print quality. What I love: Reusable: Just dry them out and they’re good to go again. Practical for 3D printing: You can even 3D print a holder to attach them to the roof of the ACE Pro, which makes them super convenient. Great value: A pack of five lasts a long time and gives plenty of coverage. These are awesome little canisters and do exactly what they’re supposed to. If you’re looking for a simple way to manage humidity in a filament dryer, I highly recommend them!

These Wisesorb silica gel canisters work exactly as advertised. I use them in my gun safe and tool cabinets, and they effectively absorb moisture without any mess. The color change from orange to green makes it easy to know when it’s time to recharge. I appreciate that they’re reusable—just pop them in the oven and they’re ready to go again. Great value for long-term moisture protection. Q&A Section: Q: How do you know when they need to be recharged? A: The beads turn from orange to green to signal it's time to recharge. Q: Can these be reused? A: Yes, they are fully reusable—just bake them at low heat to dry out the moisture. Q: Are they safe to use in gun safes and closets? A: Absolutely—odorless, leak-free, and compact enough for tight spaces. Q: How long do they last before needing recharge? A: It depends on humidity, but generally they last 2–4 weeks before needing to be recharged.

Have to recharge these frequently but work as described. If you have a need to have lots of these you might use the containers and buy bulk refills so you can store your wet ones in bulk and only recharge once a month. I purchased these and made them open friendly so I could replace the beads and save recharges to one time every 6 to 8 weeks. This plus a large container of the same type silica red green.

Excellent silica gel canister. Feels great, good values, and easy usage. Bought this for my ammo storages and they keep my bullets dry.

Worked very nicely, I used them for the AMS on a Bambu printer, I took out the beads and printed a container for them. It’s been about 2 months and they started turning blue, put them in the microwave and now they are back to bright orange. The AMS has a humidity sensor and it shows that with the beads inside there is low humidity so it seems to be working good!

They are small and compact, work as intended and can be put in the oven to “reset” them. I use them in my ammo storage and love them

Fits nicely in the ammo can where I store my primers.

I like the ease of use and the moisture that they removed, they seamed to work good. The only problem I had was using the microwave to dry them out for reuse. The cloth packs when drying would be wet on the bottom and you have to turn them over and dry more and you have to continue this process for MINUTES. You have to be careful not to over dry because the silica will turn black and then they are useless. It is hard to judge when this will happen while you are trying to dry them out, may have just been me or my process??? Either way I have 3 left and will probably not buy again. They are nice but hard to dry for reuse.