BACK REST MODEL: B2
size: 350 mm x 420 mm
BACK REST MODEL: B3; B3J
size: 390 mm x 390 mm
BACK REST MODEL: B4
size: 400 mm x 370 mm
BACK REST MODEL: B5
size: 370 mm x 400 mm
BACK REST MODEL: B7
size: 540 mm x 260 mm
BACK REST MODEL: B8A
size: 440 mm x 440 mm
BACK REST MODEL: B10
size: 490 mm x 390 mm
BACK REST MODEL: B12size: 530 mm x 420 mm
BACK REST MODEL: B14
size: 505 mm x 481 mm
