GDK-108 is set of fluted clear glass doorknobs. This style of knob was popular in the late 19th and early 20th centuries. The beautiful facets of this knob are highlighted by foil at the base of the knob. This foil amplifies the reflected light showing off the knob's outstanding detail. These high quality pressed glass knobs has a solid brass base done in a polished nickel finish. Rim of brass base folds over base of glass knob for secure grip. Set includes 2 knobs, steel spindle and an Allen or hex wrench for set-screw adjustment. The knob is 2" in diameter. The diameter of the base if .61" Please note that the knobs are a special order item and may take up to ten days to ship. They are returnable if you are completely satisfied.