Garvin 53C1-VT 4″ Chicago Plenum Flat Double Gasket Extension Ring

Garvin 53C1-VT Description

Chicago plenum flat 4-in square double gasketed extension rings create an air tight seal between boxes and extension rings. They are added to junction boxes to increase wiring capacity and provide access for additional conduit runs and electrical wire. Garvin’s extension rings prevent the need to remove old conduit boxes and wiring from circuits when additional wiring is needed. Their bottom mounting slots allow a quick installation onto existing boxes. Red painted extensions rings are also available for fire alarm circuit identification.