View Larger Low Profile Trundle/Storage Drawer Collection: Grace Item #: 8810-9500 75W x 41D x 10H On Casters. Use with the 8810 Twin & Full Low Post Spindle Beds, Upholstered Beds, and Upholstered Daybed. Cannot be used with the Queen Upholstered Bed.Takes a standard twin mattress (max size: 75x39x8) for use as an extra bed or 2 removable dividers (included) allow for organized underbed storage option. Requires Bed Rails. Taller Spindle Feet (included w/Trundle/Storage Drawer) replace shorter Bun Feet on Low Post Footboard & Upholstered Footboard (not needed for the Daybed). Rails must be in High Lock Position on Headboard. Slat height: 12".