factory steel upper and lower bunk construction site iron bed height-adjustable bed staff dormitory students bunk bed bunk bed pressure bed

matte black single layer 900 elegant white single layer 900 matte black single layer 1000 elegant white single layer 1000 matte black single layer 1200 elegant white single layer 1200 matte black single layer 1500 elegant white single layer 1500 matte black double layer 900 elegant white double layer 900 matte black double layer 1000 elegant white double layer 1000 matte black double layer 1200 elegant white double layer 1200 matte black double layer 1500 elegant white double layer 1500

thickened bed board closed thickened bed board