Bed & Rails can be sold separately as Twin Bed, Bunk Bed will Accommodate Max of 11" of Mattress & Foundation. Works with 936 Extension or 980 Full Extension. Accommodates the 909 Dual Function Storage Unit or 939 Bed Box, Slats Included in 976S Bed Ends Weight: 241 Width: 80 Depth: 43 Height: 73 Assembly Required: No