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SB640

42'' (106.7 cm) W × 32'' (81.3 cm) H

SB660

54 3/4'' (139.1 cm) W × 41 5/8'' (105.7 cm) H

SB680

65 5/8'' (166.9 cm) W × 49 1/4'' (125.1 cm) H

#2

SB640/SB660:

69 1/2'' (176.5 cm)

SB680:

77 1/2'' (196.9 cm)

smarttech.com/kb/001414

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SB640, SB660, SB680

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