Tubing Repairs Repairing of the vent tubing is essential in order that the air be distributed to the locations intended From a 10 hole or cut as much as 1000 CFM can be lost Bandaids are manufactured to be installed on all diameters of tubing with standard widths of 36 Custom widths are available and are also made special for Steel duct repairs ROCVENT INC MINE TUNNEL VENTILATION 31 wwwrocventcom