Made of strong metal frame that includes full-length guardrails,an integrated ladder, and 12 secured metal slats to ensure that your child will sleep in complete security and stability. No box spring needed 12 sturdy bed slats, no need additional box spring.Mattress sold separately. Two build-in ladders Two built-in ladders for a more convenient choice. Space-saving functionality There are two wooden triangular shelves and a large desk under the bed for children to learn and place school supplies. 58.3” under-bed clearance that you can turn the space into a clever workstation, a reading nook or a craft area. Full-Length Guardrails Showcasing guardrails along the length of the bed for extra safety, this must-have bed is a perfect addition to your furniture arrangement. Weight & Dimensions: Overall Product Dimension:71.7'' H x 41.7'' W x 79.9'' L Desk dimensions:15.7'' W x 39.4'' L Shelf dimensions:15.7'' W x11.8'' L Overall Product Weight:108 LBS Weight Capacity:Upper bed: 200LBS,Desk : 50LBS Recommended Mattress Thickness:Upper bed: 6" Specifications: Product Type:Loft bed Size:Twin size Color:Sliver+Brown Material:MDF+Metal Box Spring Required:No Number of Slats:12 Assembly Required:Yes(Full assembly) Package Size: Package 1: 78.35x17.52x7.68inches, 108.03lbs