The 12V, 16CFM, 33mm Blower Fan really moves some air. Pulling about 1Amp @ 12VDC, this blower is rated at 16CFM. Manufacturer used this blower to build small hovercrafts and to cool off on a hot day, they're also handy for inflating ''transforming'' e-textiles garments. Outside diameter of nozzle is 30mm.