The FHC Back-To-Back Flute Knob measures 1-3/16" (30 mm) in diameter, and extends 1-1/16" (27 mm) from the door surface. Knob is made of solid brass
Unique Back to Back Knob Design - Solid Brass Material with High Quality Plating
Designed for use with 1/4"-1/2" (6 mm to 12 mm) Tempered Glass | Used M6 X 1.0 Threading