Built to last
I've been gardening for 35 years and growing from seed for many years and these are the best built, sturdiest trays I've come across. Yes, there are boutique garden suppliers who may offer trays made even more durably, but they charge an arm and a leg for them. These 1020 trays are the best combination of quality and price. I reserve my heaviest soil block loads for these and they hold up beautifully. In fact, I've never had one break and I fully expect them to last for many years to come.