Specifications Color: White/Gray/Espresso Material: Pine Wood, Plywood, MDF, Engineered Wood Overall Dimension: 37.5" x 93.5" x 66" Height of Guardrail: 14" Overall Dimension of Trundle: 40.5" x 75.5" x 9.5" Net Weight: 100.5 lbs Recommended Mattress Thickness for Upper Bed: Under 8" Recommended Mattress Thickness for Trundle: Under 6" Weight Capacity of Bed: 350 lbs Weight Capacity of Trundle: 350 lbs Key Features ● Space-saving Detachable Bunk Bed: This wooden bunk bed features a twin sized upper bed, a lower twin bed and an additional trundle bed, meeting the needs of families with multiple children. It can be converted to 3 twin beds, providing you with more options. ● Convenient Removable Trundle Bed: The twin-size trundle bed smoothly glides on wheels and comes with 2 cut-out handles for easy pull-out and storage. Its convenient design is perfect for accommodating overnight guests, and the raised under-bed space can be used for storage. ● 4-step Staircase with Storage: The bunk bed is equipped with a sturdy 4-step staircase, replacing a ladder, ensuring a safe and convenient experience for children. There is large 4-tier storage space behind the staircase, allowing you to organize toys, books, and other items. ● Sturdy Construction and Safe Design: The bunk bed frame is crafted from good-quality solid wood, providing exceptional strength. The upper bed is equipped with a 14-inch high safety guardrail to ensure safe use. ● No Spring Mattresses Required: This bunk bed comes with dense wooden slats, eliminating the need for additional box-spring mattresses. Detailed instruction is included in the packaging, and all components of the bunk bed are numbered, facilitating quick assembly.