40 for the one with legs (feet) and 30 for the one without (60 for both). As pictured instruction grade hem fir nontreated 2x6x3' square approx. 3/4" nontreated plywood, pictures say it best.
John in Eagle River by Fred Meyers text ak 252-93two4.
Used to transport goods ,these industrial crates would make a good planter or your idea, the floor is 3/4" plywood so stout.
Thanks, John
Last picture, firewood for 40 bucks, more available.