Fashion Bed Group PowerLift Plus Double Center Bed Support System KPL-11 for Wood and Side Rails with (6) 11&rdquo; Height Adjustable Glides and Clamp Assembly, Queen - California King Solves any unexpected super-sized Queen or King bedding problem Adjustable width and height-adjustable legs delivers support needed C-clamps makes assembly easy, while providing infinite adjustability (2) Cross supports with (3) 7 to 11 adjustable glides Protected with a 1-year limited warranty against manufacturing defects