Fluted Glass Doorknob Set.
Clear glass knob measures 2 inch diameter. Overall knob projection measures 2-1/4 inch.
Available with Polished Brass (image 1), Polished Nickel (image 2), Brushed Nickel (image 3), or Oil Rubbed Bronze (image 4).
Set includes 2 knobs, steel spindle, and an allen key to tighten set screws.