Fresh air box Pick-up Split Bus 03/55-07/67Silver Weld Through (SWT) This box is welded to the roof and because water and moisture flows in easily, many are rusted out. Our fresh air boxes come complete with all opening and closing mechanisms for the flaps to direct the fresh air. Two models to choose from; for bus, kombi and panel van, or the short model for the single & double cab pick up truck. Another BBT developed top quality part. SPECIAL ORDER UP TO 10 DAYS DELIVERY NON STOCK ITEM