Medium Humidity Domes

I've used these trays for many years. They are good, but not well designed from the standpoint of breakage. If there is much weight in them, be sure to use two hands -- the flanges will snap off or the tray will crack vertically down the side wall. IMO a better radius on the flange or several small gussets would solve much of the problem. They also degrade from sunlight. That said, they are better than most others and with care will last a long time.