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Standard Piece (CB) Dimension(mm): 65 x 200 x 12 1 sqft 5.5pcs (with gap) 10.17 sqft/box 60pcs Corner Piece (CBC) Dimension(mm): 65 x 200 x 95 1 ftrun4.0pcs (with gap) 13.5 ftrun/box=54 pcs