Wire Grid Back System for Centered Backs (BXSWG)

BXSWG-(NW)(NH)
BX….. Extension Back
SWG…..Wire Grid for Centered Backs
NW…..Nominal Width 3′ or 4′ (914 mm or 1219 mm)
NH…..Nominal Height 12″ to 48″ in 12″ increments
(305 mm to 1219 mm in 305 mm increments)