These are Vevor newer alu frames - they are MUCH lighter and more cheaply produced than the better, older one, but they are solid and will hold a mesh. But I was here for a bargain, and Vevor provide that (plus fast shipping and very good packaging).
The mesh, however is loose. It won't take a lot of printing and you'll need to remesh them sooner than before. However, at this price, and with know-how, you'll be able to remesh yourself and save in the long run. You're basically buying the frames and test meshes. There's also the roll of not very sticky silver tape to have fun with. Recommended.