When the upper back is adjusted to more than 60 mm above the lower back, a spacer block can be mounted. A spacer block will create a larger area of support and thereby better stability and distribution of pressure.
Size 1
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Size 2
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Size 3
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Item number | 903100-1 | 903100-2 | 903100-3 |
Compatible with | For back width 180,220,260 mm | For back width 220, 260, 300, 340 mm. | For back width 300, 340, 380, 420 mm |