Kings Brand Black & Walnut Finish Metal Twin Size Convertible Bunk Bed (Bunkbed) Kings Brand Black & Walnut Finish Metal Twin Size Convertible Bunk Bed (Bunkbed). Functional and space-saving, this metal bunk bed is perfect for kids sharing a room or for sleepovers. The bunk bed includes a platform with metal slats for support, Designed for long life and safety. Integrated ladder & Full length guardrails for upper bunk for added safety. Dimensions: 81" x 55" x 69". Simple assembly required.