Overview Product Description Supply air boxes for grille can be mounted in ceilings, walls or floors. Product Videos Custom Field Product Reviews Write a Review Write a Review × Nilan High box for grille with telescopic part (500x60 - 3 connectors) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *