These lightweight crates are designed to provide a convenient way to contain well-behaved pets on the go. Although they can be used in-home, one of the most important features of a folding cage is that it can be easily collapsed to be stored or transported. When not being used, units collapse into a package less than 4 inches tall and feature a removable, top-mounted handle. Multiple doors lock easily with a slide-bolt latch. These crates are finished with an epoxy coating which is rust, corrosion and fade resistant, even in extreme climates. Crates are constructed from all-steel, high tensile-strength wire with gauges ranging from 5 to 9. Item arrives fully pre-assembled. To use, simply unbox and fold open; no tools are required. Each crate features an ABS composite tray that is durable, super easy-to-clean, and unlike cold and noisy metal trays, will not stain, rust, warp, corrode or retain pet odors. The tray features a perimeter lip and is held in place with a retaining bar. For maximum pet comfort, select a unit 4 to 6 inches longer than the dog’s body length and 4 to 6 inches taller than its shoulder height. If the animal is not fully grown, please consult a breed chart to approximate the dog’s future adult size, and choose a cage accordingly.