Probably about as good as you'll get, these days. We used to have some truly heavy-duty nursery trays that eventually expired after many years of faithful service. I've looked for the equivalent for a long time, without success. These trays will "do." They're heavier than what you're going to find at a garden center or a big-box store, anyway. They should last a few years, if I'm careful.

I use them for 8 trays of microgreens. They are sturdy and long lasting.

Lots heavier than the black nursery trays. I expect many years use from them. At this point I recommend them and the supplier.

The trays are sturdy and easy to use. Gave 4 stars only because they are slightly too narrow to fit my light system. Thanks for a good product!

These are definitely stronger than the standard seed trays. The corners are still a little translucent but I'm sure they'll be ok. Time will tell but they are step up from buying those flimsy trays every year