The Harville Fan is named for Terry Harville. Terry helped design and then laser cut the fan blades and canopy. This fan is rapidly becoming a best seller as I have sold more of the Harville Fan at trade shows than any other. The Globe unscrews and can be exchanged for any of the several styles shown below. The bulb is a bi-pin GOR and is easily replaced. The blade diameter is 3.625 and 1.68" in height. Installs with your regular 12 volt system; minimal additional wiring is needed for the working part of the fan. Instructions are included. Fan speed is adjustable.