a),UNIQUE balancing-net structure, patent products; b), HIGH-QUALITY,20 years warranty, c), ... , unique balancing system;2, Special use of super-elastic balancing net and few springs;3, Effectively distributes body pressure, provide you ... pieces. Sizes for referenceProduct NameModel numberStandard Size(H * W cm)Spring mattress999#120*200cm150*200cm160*200cm180*200cm120*195cm150*195cm