... big core high carbon steel,Height 200mm Spring mattress structure & main materials1, using 72 # 6 ring big core high ... mm. Flyer sixty, wire diameter 1.6 mm. A force spring 65, wire diameter 3 mm.2, the 850 g / square ... pressing blanket 2 slices, 320 g / square meter white chemical fiber cotton 2 slices.3, fabrics: JinBianBu, clamp fly cotton: the ...