www.GarvinIndustries.com – 4-11/16″ square, flat, double gasketed steel rings are double gasketed for use with Chicago plenum boxes that require extension rings. They create an “air tight” seal between Chicago plenum boxes and extensions rings.
Product Page: https://www.garvinindustries.com/Electrical-Box-Covers/4-11-16-Square-Box-Covers/Flat-Covers/73C1-VT
Garvin Industries Homepage: https://www.garvinindustries.com/default.aspx
Post time: Jul-03-2017