AmeriVent 8HS-RSA12 Roof Support Box, Black

For exposed-beam ceiling installations. Available in flat to 6/12 pitch (Standard) and for steeper pitches of 7/12 to 14/12. Can be used up to 22/12 with double wall connector. Use ceiling support when chimney is to be installed in standard ceiling. Contains stainless steel matte black single wall adaptor.