Sidewall extension boards

use the sidewall extension to increase the trailer volume and verstaility.
The boards come up in 500mm for the trailers NS8 and NS13, which adds 5m3 of volume. For the trailer NS23 there is extra board 400mm high, and bring up 7m3 of volume. For the trailer NS33 the extra board is 400mm and bring up 9m3 of extra space.
Sidewall extension boards