Handy Box Extension Ring; 4" Height; 2-1/8" Width; 1-1/2" Depth; AISI/SAE 1008 Pre-Galvanized Steel Material; Knockout Location (6) Side (2) End; 8 Number of Knockouts; Knockout Size (6) 1/2" Side, (2) 1/2" End; 1 Number of Gangs; 10.3 Cu Inch Capacity