Bed Combination Merax of King Bed Mattress and King Metal Folding Bed Frame(11 inch Perfect combination of memory foam mattress and metal bed frame Bed frame: stable and long-lasting structure provides perfectly support to the mattress and the headboard Bed mattress: soft, skin-friendly, deep sleep, moisture permeability Buy together to save more money King mattress(80*76*11inch) + King bed frame(80*76*12inch)