Overall : 40w 73d 5h Mattress Space : 72.25w 39.25d Caster Details : six non-locking; swivel Includes : complete trundle bed frame and mattress support system; mattress not included Mattress Support : solid surface Mattress Support Details : steel platform Considerations : bed designed for a trundle mattress; mattress height of 5 recommended; shop our mattresses for a perfect fit Approximate Product Weight : 60 lbs. Compatible With : all sizes of Architecture, Core, Jennings, Chapman, Parsons, Piper, Pogo beds; Fort beds and bunk beds; Waverly bunk bed Product Origin : made in Minnesota Material Origin : United States and imported Item Number : 811443