MRC:
The element,compound,or mixture of which the cushioning is fabricated,excluding any surface treatment.ALTD
Cushioning Material:
Rubber, cellular, mil-p-14401, type 2, class cs or rubber, cellular, mil-p-14401, type 2, class vs or rubber, cellular, mil-p-14401, type 2, class wf
MRC:
The element,compound,or mixture of which the support is fabricated,excluding any surface treatment.ALTN
Support Material:
Steel, qq-s-636, cond 3-canceled or steel, qq-s-636, cond 4-canceled or steel, qq-s-636, cond 5-canceled