... PatentParts:chamber, air compressor,sponge mattress,pillar 1.Basic components: Air chamber, windows(was made by PVC), mattress, pillar, air pump, ... pressure gauge (the press scope is10Kpa-40Kpa, personal controlled) , valves, carbon filter and other accessories. 2. Air ... .01 microns Can be used with frame and mattress for extra support.Patented 2-zipper seal facilitates ...