Product Overview
The Duravent 4BVFS is a firestop spacer for use with 4" venting. It is used to protect combustible materials where the pipe passes through a wall or ceiling. The 4" firestop spacer is a 6-1/2" square with an extended bottom flange.
Tech Specs
California residents see Prop 65 WARNINGS
WARNING!
Warning: Cancer and Reproductive Harm - www.p65warnings.ca.gov
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