Review on LEVINCHY Vacuum Zipper Bags 18 Pcs: Reusable Food Sealer Bags with Double-layer Zippers - BPA Free, Medium Size (7.8*9.8 Inch) by Jennifer Woodard

In general the bags work great and I have no issues with the bags themselves. I bought these to store my 3D printing materials so they don't attract moisture but I found some of the rolls to be too big are to fit through the hole, which is a bummer. I bought these with the understanding that they will work with most vacuum sealers and you don't need to purchase an additional vacuum pump. I have a Müller vacuum sealer that works really well and has a glass attachment. The glass mount works with these bags, but it's a little tricky to get it right into the bag's valve, but once you find that nice spot, it works fine. After checking, I didn't find anything in my Mueller docs that suggested it would work with these package types, so I'm not sure if it was designed to work with them or just happened to be. Check your vacuum sealer to make sure it will work with these bags.