Octagonal Glass Doorknob Set.
Clear glass knob measures 2-1/4 inch diameter. Overall knob projection measures 2-5/16 inch.
Available with Polished Nickel (image 1), Brushed Nickel (image 2), Polished Brass (image 3) or Oil Rubbed Bronze base (image 4).
Set includes 2 knobs, steel spindle, and an allen key to tighten set screws