The Ultima™ Bed Frame is our original heavy duty all size frame. It will work for twin, full, queen, king, and cal-king size mattresses. This heavy-duty bed frame features thick 1.5 inch tall side rails to prevent flexing. It also comes with a head to toe double beam center support that works in every size. This version of the Ultima™ frame comes with wheels and is ideal for carpeted flooring. Your mattress will be raised 7-1/2 inches off the ground.