It's a Magliner Vertical cart. There's a Magliner Warehouse in Lenexa, KS that built it for me in about ten minutes after I picked out the details like the longer tongue plate and bigger tires. The only thing I changed after I got it were the handles. The stock ones seemed to be taking up useless space, so I bought the lower profile ones from http://www.backstageweb.com/index.htm which is the same place I got the shelves. Lots of cool Magliner add-ons there.