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SB685

77 1/2'' (196.9 cm) W × 49 1/2'' (125.7 cm) H

SB690

85 3/4'' (217.8 cm) W × 49 1/2'' (125.7 cm) H

77 1/2'' 

(196.9 cm)

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smarttech.com/kb/001414

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#2

SB685: 

4'' (10.2 cm)

SB690:

 6'' (15.3 cm)

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SB685, SB690

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