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A Flame-retardant foam board.
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A 7.5cm, the thickness can be increased.
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A 20 feet 37 square meters, 30 feet 56.16 square meters, 40 feet 73.63 square meters.
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A 20 feet: length 5.9 meters×width 2.2 meters×height 2.48 meters, 30 feet: length 9 meters×width 2.2 meters×height 2.48 meters, 40 feet: length 11.8 meters×width 2.2 meters×height 2.48 meters.
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A 20 feet: length 5.64 meters×width 6.16 meters×height 2.24 meters, 30 feet: length 8.84 meters×width 5.98 meters×height 2.24 meters, 40 feet: length 11.54 meters×width 6.08 meters×height 2.2 meters.
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A 20 feet: length 5.9meters×width 6.3 meters×height 2.48 meters, 30 feet: length 9 meters×width 6.24 meters×height 2.48 meters, 40 feet: length 11.8 meters×width 6.24 meters×height 2.48 (2.26) meters.
