1.Chemical fiber cover.
2.cheap
3.superlastic inside
4.compress packing
5.comvenient
Quilted Chemical Fiber Cover
Quited Foam:2cm(H),density 25kg/m
3
for top
Insulator+Felt:600g,1 layer;1100g,1 layer=>for top of spring
Superlastic Spring:17cm(H),wire gauge1.8mm
Insulator+Felt:600g,1 layer;1100g,1 layer=>for bottom of spring
Quited Foam:2cm(H),density 25kg/m
3
Quilted Chemical Fiber Cover:200g/m=>for bottom
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