OVV3D Filament Storage Bags 30pcs, Plus Size 32X34cm 3D Printer Filament Storage Bags Vacuum Sealed Kit with 30 Desiccants, Auto Pump,Perfect for 3D Filament Storage or Using After Filament Dryer Box

I've used a few different dry-box storage options, and this one has worked the best for me for longer term storage. I've used about 10 or more bags already and only one hasn't held a vacuum very well. All of the others have stayed very tight for several weeks and appear that they will last for a long time. The bags are a bit tight getting the spools of filament in them. Don't expect to get a large spool in them, but the average size ones do fit. The vacuum pump works very well and will bend the filament spool sides in on partial rolls if you let it. It pulls a much higher vacuum than any of the other pumps I've used before and it gets a great seal on the bag when pumping. The only thing I have to do is remember to raise the bag a bit on a flat object where the pump seals so it will stay flat when getting pulled in tight. I'll definitely be buying this again if I ever need more bags. But since they are reusable, it may be a while before I need more.

I did not have high expectations for this when I bought it. I have been pleasantly surprised. This system works amazingly well. I add a small hygrometer to my sealed bags of filament. Typical in-bag humidity with a roll of filament runs around 20-25%. The bags last for a few (roughly 5-10) re-uses. The little plastic clip to help seal the bag is not as silly as it seems. the bags are double sealed and the little plastic sealer clip helps line things up nicely. The electric vacuum pump is a little slow, but really not too bad considering how much vacuum it creates. It takes me about 10-20 seconds to seal up a bag. Note to OVV3D: Please make a clear plastic box version. If you have several colors of filament (who doesn't) the bags can be a little tricky to stack on a shelf.

I've had these for a while now and I'm disappointed. The air pump seems to work fine, and I was pleased at first. Put my filament in the bags, sucked out the air, and put them on the shelf. However, I'm finding that about 50% of the time when I go to get a filament off the shelf, it's no longer vacuum sealed as the bag has inflated and there's are inside. I'm not sure where the actual failure point is, as it appears the air is leaking in slowly. It could be the zipper, because it is very hard to close it. It doesn't seem to lineup quite right. I go back and forth over the zipper several times to make sure its sealed as best as I can. It could also be the air valve that is failing. Whatever the issue is, it's kind of a pointless product if it can't actually stay sealed.

They are not very durable, I've only used 2 so far and besides being very thin both would not hold vacuum. Hope the rest will because out of the return window. If they get better I'll up the rating, if not I'll reduce it.

These bags are great. Perfect size, plenty of desiccant, and seems like good quality. I could not get bags to deflate so I contacted the support email located in the instructions. They told me to put the corner of the bag on a flat surface with the valve up. Then place the pump on the valve and turn it on. Works perfectly. If you try to pump with the valve not flat it doesn't work. Support is great. They responded in less than 10 hours.

In general, this kit does its purpose to store your filaments in vacuum bags, and you get plenty of bags and desiccants along with the included automatic pump. The pump has a micro USB port for charging, which isn't as straight forward to connect like a type-c one, and it doesn't go all the way into the pump when connected and looks somewhat 'disconnected'. Though, its as far as you can push the connector in. The pump itself is not very strong and it takes some time to adjust it on-top of the vacuum hole on the bags, and once it begins the suction it does take about 15-20 seconds until it sucks all the air out. So personally, I would probably use my cordless vacuum cleaner with some sort of a 'rubber attachment' on its hose to make a nice suction on the bag if I ever need faster operation. But in general, the included pump is quite enough for occasional use. I think that it's an okay kit overall, yet the price is a little high in my opinion for bags, desiccants and a low powered automatic pump. I still recommend it as a kit, though.

It works and I like it. I have 1 year with this and no problems at all.

UPDATE: After two months of ownership and hobbyist use, the vacuum pump is now completely dead. It won't take a charge. The bags are a commodity item available from other sellers for less money, and the desiccant bags, lacking indicator material, aren't all that useful. Since the vacuum pump is really the thing that differentiates the OVV3D product from others, I can't recommend this product any longer. First, I haven't found a five-star filament bag; they've all got flaws. But I like these better than the Sunlu-style bags, which work once or twice if you're lucky. This kit bundles a generic vacuum bag originally made for sous-vide cooking with some basic silica-gel packets, a handful of clips to aid in sealing the bag, and a rechargeable vacuum pump. The bags are a commodity item. Frankly, you can get them cheaper from other vendors, and I recommend that you do for refills. They have about a 95% success rate: about one in 20 will fail to seal from the start. They seem to survive multiple open/seal cycles without losing seal pretty well. They fit most 1kg cardboard filament spools well, but they're a little small for many plastic spools. A Bambu Lab spool is about the comfortable limit. You CAN shoehorn an Atomic Filament spool into the bag, but you'll have difficulty getting the vacuum pump on the right spot. (Something about an inch and a half tall to elevate the vacuum port helps.) The clips help you make a good seal on the double-zipper. They're not part of the bag, and many alternative bag sources don't include them. Sadly, OVV3D doesn't include as many clips as bags, so you'll have to keep track of where you put them instead of just installing one per bag. The vacuum pump works. I don't know how long it will work; from day one, it made an overheated-motor smell, and after a month it's starting to struggle sometimes. It recharges via USB Micro-B; a VERY short cable is included, but no charger. There's room for improvement with the pump. The way these bags work, you have to have the bag on a flat smooth surface and press the pump firmly onto the vacuum port and hold it there while it evacuates the bag. There can't be any wrinkles under the vacuum port. That's where large spools get tricky. If these bags had an extra inch in each dimension, they'd work a lot better. The included silica gel packets seem to work, but they're the basic disposable kind with no indicator to tell you how used up they are. For filament storage, you'll probably want to buy good indicator-type dessicant bags instead. So you're buying this kit for the sealing clips and the vacuum pump. Still, it's the best kit I've tried so far. Just DON'T get the version with the manual pump. It takes FOREVER to work due to its small size, and it's incredibly awkward to hold in place. That version's totally not worth it.