This bed comes with multiple function. This bunk bed is combined with a loft bed and a platform bed, providing flexible use of it. The loft bed features storage shelves and a desk which offer you a workstation if you need. The top bed is equipped with full-length guardrail, guaranteeing user'safety. The platform bed is equipped with four wheels which makes the platform bed easy to move, and the wheels can be locked for better stability. You can use the bed as a bunk bed or a loft bed and a platform bed, making your own decision.Description:Material: Steel +MDFSize: Twin over twinColour: BlackNumbers of slat(top/down): 11/ 11Function: Bunk bed / Loft bed & platform bedDecoration: With shelvesSpring box: No needAssembly required: YesDimensions:Top bed: 40.9" x 77.2"Down bed: 40.9" x 77.1"Total height: 66.9"Top bed weight capability: 220lbDown bed weight capability: 300lbsDown bed recommended mattress thickness: 8"-10"Top bed recommended mattress thickness: 6"shipping 2 packages:First Package: 58.66"L x 16.14"W x 10.83"HSecond Package: 78.54"L x 13.7"W x 3.94"H (Total weight: 134.79lbs) Notes:1. Manual measurement has been used, there may be some reasonable error.2. All the pictures are taken by actual samples, slight chromatic aberration may occur due to lighting or display.