Selkirk Support Box Mobile Home 8" X 24" No.8t-Sb Type A

Features. Support box intended for use when installing chimney in a frame.. In a mobile home or in a ceiling under a narrow section of roof.. Provides a finished installation at the ceiling level will support up to 20 ft. Of a 6 in. Diameter chimney.. Also provides shielding from insulation when installed in an unoccupied attic space.. Assembly is comprised of a black box designed for installation inside 16 in. O.c. Joists.. A cylindrical shield.. Support bucket ceiling trim 4 screws.. Size - 8 in.. Dimension - 15.25 x 15.25 x 24.75 in.. Item weight - 15 lbs.