3.57" O.D. (outer diameter) x 3.29" I.D. (inner diameter)
Shade holder has 7/16" center hole that slips 1/8IP
Has #8-32 eyelets
Unfinished brass holder, 3-1/4 inch fitter, 2.32 inch tall with set screws. 3.57 inch outer diameter x 3.29 inch inner diameter. Shade holder has 7/16 inch center hole that slips 1/8IP. Three #8-32 eyelets, has a rolled bottom edge.