4SE12 4" Square Extension Ring, 1-1/2" Deep, Drawn, Metallic

4" Square, Extension Ring, Drawn, Metallic. Depth: 1-1/2". Side Knockouts: (12) 1/2". Cubic Inches: 21.0". Combo Extension-Thru-Ring. Top has (2) 8-32 Screws & Bottom has (2) Slide On Slots.

Appleton and O-Z/Gedney metallic 4" square boxes, extension rings and covers are widely recognized for quality, selection and ease of installation. They may be used as a junction box or a device box for switches, receptacles, GFCIs, etc. Manufactured of durable materials with consistent construction means easy installation, making all the difference in the speed and final quality of any wiring job