Multi-purpose Trundle Bunk Beds :This functional trundle bunk bed helps to save space greatly. Perfect choice if you have more kids. It can also be converted into 2 individual beds when your kids get older or you have visiting guest ,it serves easily as extra beds for them to sleep in . Heavy Duty Bunk Bed :This twin size metal bunk bed frame is made of heavy duty steel ,which provides sturdiness and durability.250 lbs of upper bed ,400 lbs of bottom bed,250 lbs of twin size trundle bed . Space Saving Bed Frame :With Pull out trundle bed,this twin-over-twin metal bunkbed is great in saving space for compact place.Without cumbersome spring box, trundle under the lower bunk bed gives you extra sleeping space.Very ideal for school dormitory ,company dorm room ,and home apartment etc.