4" Square, Extension Ring, Welded, Metallic. Depth: 1-1/2". Side Knockouts: (8) 1/2" & (4) 3/4". Cubic Inches: 21.0". Combo Extension-Thru-Ring. Top has (2) 8-32 Screws & Bottom has Cutout for Switch or Handy Box.

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.

Also known as: 687855627615, 4SSBESPL, APP4SSBESPL, Window Box, Hollywood Box, california box, picture frame box, Single gang to 4 square take off box., Buddy Box, Bauer Box, Take off box, Bowers box, add a box, back out box, EA, single gang to 4 square adaptor, extension adaptor, presto changeo, window pane