Overview Product Description Supply air boxes for grille can be mounted in ceilings, walls or floors. The size matches a brick section for mounting in a brick wall. The robust materials make them suitable for embedding without any risk of deformation. Product Videos Custom Field Product Reviews Write a Review Write a Review × Nilan Low box for grille with telescopic part (500x60 - 2 connectors) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *