A cigarette holder has an elongate tubular member defining an axis and proximate and remote ends and an intermediate portion between the ends. The manufacture can be carried out with a petroleum feedstock such as an oil refining atmospheric tower residue, to produce carbon nanotubes in high volume at low cost. The nozzle has an elongated discharge portion at least longer than a diameter of the substrate and partition plates at a front and a rear in the moving direction of the nozzle. A control circuit has a fuse element. The upper surfaces of the crossbars and filler bars are substantially flush with one another to form most of the upper surface of the grating system on which vehicular and pedestrian traffic typically travel.