This is a white, queen-sized metal bed from West Elm. Purchased in 2016, still in good shape. They currently sell this style only in the brass color and it retails for $1,099.
The bed is made of metal, with a wooden slat support system for your mattress.
Only flaw: there are three support bars below the bed in addition to the four legs, and one of the three support bars is missing a screw. We personally didn't notice the difference when using the bed (we didn't notice it was broken until we were taking the bed apart).