Polymaker 3D Printing Filament Dryer and Storage Box - PolyDryer and PolyDryer Box for Filament Drying and Sealing with Heat Control, Compatible with PA Nylon, PLA, PVB, PETG, ABS, TPU 1.75mm 2.85mm

The storage container is great. There are two ports for feed tubes, so you can pint right out of the container.The included hydrometer makes it easy to see moisture levels. There is a silica pocket within the hydrometer, that helps to maintain proper levels. At the bottom of this container, there two plugs, that can be removed, so the container can be placed on the dryer dock.I have later bought one more container, this time with dry dock.Dry dock does not work very well. It takes long time to dry the filament, and moisture levels never go below 30%.The container however holds moisture levels low, for long time, if loaded with dry filament.

Great solution for drying and storing filament. This has solved my problem with PETG filament. The storage unit has two holes one on the narrow side and the other on the top for filament feed to your printer. This keeps the filament as dry as possible while printing. I bought another storage unit for my PLA. The dryer is a separate unit and can be moved from storage unit to storage unit. PETG drying takes 6 hours. The storage units have desiccant and a humidity meter. Great job PolyMaker!

The polydry box is very good. I tossed the provided dessicant, and went to color indicating desiccant. I added a couple of drawstring mesh bags filled with dessicant and tuck it in under the lid when it is not in use, it drives the humidity down to 15% in about 24 hours. I live near the ocean with foggy nights, so pretty damp. I added a 10mm hole out the lower back and relocated the grommet and tube for use with my Ultimaker printer, it feeds smoothly with the nice bearings. My prior home made box only stayed dry for 4 days, now the polydryer box seals are excellent and holds the dry level for several weeks at 12-15%. The PLA material no longer turns to glass and breaks apart when humid/wet, the PLA stays compliant and useable and this box really extends the useful life of the print material. The print jobs have been very consistent with no threads, reliable prints every day for weeks. Being clear all around, makes it easy to see the material level. The humidity sensor is a nice touch. Bought a couple of extra containers.

Bought just the storage box version of this item to keep my filament dry while printing. This was one of two storage options that I could find that would let me print from the box without also being a dryer as I already have a filament dryer. This was cheaper and easier than a DIY solution as I only needed one of these.It does keep filament dry but has has some small issues when trying to print from it. The first issue is that the bearings used for the bottom two rollers don't roll as well as I would've expected, even after lubing them it still feels like there is a bit of resistant pulling filament from the box when it sits on the rollers, whereas when the roll is sitting on the plastic tube that can be used instead, there is very little resistance when pulling on it. But the plastic tube has its own issue. The tube just sits in and on some plastic "rails" that are a part of the sides of the box to keep it in place, the problem is that when you don't have the lid on or you are printing with a mostly full roll the sides will bow out a little causing one side of the tube to fall down and one side of the filament roll will be sitting on the bottom rollers. It is also quite annoying trying to get the tube in the right spot when dropping it in with the filament roll.The other parts of the storage box have been fine. The PTFE tube was just long enough to have the box sitting next to the printer and lets the filament make the bend over the top of printer to over the hotend with little friction. The desiccant box works and hydrometer seems to be accurate enough for its purpose, but it can be hard to read at certain angles.If you are like me and only needed a dry box to print out of and not a whole other dryer, then this box should be good enough despite the issues.

The Polymaker PolyDryer with PolyDryer Box combo works as intended.It does in fact heat up and dry out filament reasonably well, seems well made, doesn't make too much noise and is reasonably compact with a modular design. The base unit does the work, and the removable, sealable Box unit can store your dried out filament indefinitely with a hygrometer and desiccant visible with the clear box.So, what's not to like? according to The Internet, it's an overpriced, underperforming monstrosity.In my observation:The Bad:1-The removable Box unit has a top lid with unusually difficult to operate latches.2-The removable Box unit has two easily misplaced bottom sealing plugs that must be removed when placing the Box unit onto the PolyDryer unit. No provision is made for holding these two plugs when not in use.3-The instruction manual is a bit sparse with no mention of actual intended temperatures, humidity or power levels. Also, worryingly, it advises to unplug the Power Supply from the wall when not in use. This seems like an unusual precaution in modern times and calls into question the quality of the Power Supply.4-The LCD displays in both the base unit and the inboard Hygrometer are difficult to read off-axis.5- No actual temperature displays are included, just a relative heating level selector and timer on the base unit and a Hygrometer inboard of the Box unit.The Good:1- It works as described and expected with easy to use controls.2- While hardly silent, the sound is reasonably unobtrusive.3- The Box section seals really well and has an inboard Hygrometer and Desiccant container, the Desiccant itself being re-usable and replaceable.4- It is reasonably compact and there modular Box units are sturdy and well-sealed.Neither good nor bad:The Power Supply is external, and thus replaceable. Odd that it is not built in, but whatever.Not very stylish at all. Just functional.Not especially cheap or expensive.In comparison to my first Filament Dryer unit, an eSun eBox Lite:The Polydryer works better and allows for sealed storage.So far has lasted longer as the eSun's heater failed within the first few hours of operation.The eSun is easier to open and close and looks nicer.Both have very similar controls and displays with three relative heating levels.The PolyDryer costs more but works better.The eSun manual is not quite as sparse, with actual intended temperatures, power and humidity levels published though probably wildly optimistic.