This Waterfall knob matches many of the Waterfall hardware handles that have an insert of amber-color plastic. This knob is made of the same light-weight amber-colored plastic, but it has been coated with the gold-tone paint that much of the hardware has. If you are missing a knob, this one will go with about any of the Waterfall-style handles.
The concave knob measures 1 5/8 inches in diameter. It projects 3/4 inch from the surface. A screw will be included.