GOOD QUALITY WOULD HAVE PREFFERED A BIT HEAVIER DUTY
I place them in an open weaved planting tray of the same size and wind up with a very sturdy result. Used alone, they will hold water well but with plant starter pots filled with plants and moistened soil, they feel a bit flimsy. Thus, I place an open weaved starter tray ( also 10"x20" ) and combined, they make for a solid combination resulting in a very strong tray.
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