【Box Spring for King Bed】Sturdy metal frame support.The max weight 3500lbs. 【4 inch Box Spring】It can be compatible with bed frames or used directly on the floor. Multiple sizes for you to choose from. 【Easy Assembly】The packaging includes installation instructions, which are clear and easy to understand, allowing you to quickly complete the installation. 【Easy to clean】Box spring with fabric cover only, can be quickly disassembled for cleaning. 【Anti slip and silent】The mattress foundation adopts a silent design, with seamless welding at both ends of each pillar and support frame to prevent structural deformation. When you move or roll over, it will not make any noise, let alone slide.