What does 4x4 Aluminum Sheet mean?
4'x 4' also called 48“x 48”,because this is an imperial measure. The single quote ' refers to the foot. 4' and 4' respectively indicate 4 foot and 4 foot, 1 foot=304.8 mm, 4'=1219 mm,
4'*4' indicates the width of aluminum sheet plate × length = 4 foot × 4 foot = 1219mm × 1219mm.
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