Kings Brand Black Metal Twin Size Daybed Frame with Pop Up Trundle & Mattresses Kings Brand Furniture Black Metal Twin Size Day Bed (Daybed) Frame with Pop Up Trundle & Mattresses. Includes twin size day bed, pop up trundle, and two 8 twin Size innerspring coil unit mattresses. Creates additional sleeping space for house guests and visitors at night, while during the day, it can be used as a sofa for watching TV or reading a book. Includes platform with 7 metal slats, (No need for a box spring or separate bed frame.). Dimension: Day bed: 80" L 43" W 45"H, Trundle: 75.5 " L 39". Simple assembly required.