DL Wholesale duct flanges are constructed of steel for durability, as well as powder coated to withstand rust that can form in humid environments. Offered in standard sizes including 4", 6", 8" 10" and 12". Duct flanges are meant for use with DL Air Duct, DL Light Proof Ducting, DL Insulated Ducting, and Terra Duct (as well as other standard sized ducting). These flanges have predrilled holes for attaching to sheet rock as well as plywood walls and also include an additional steel ring and bolt set for connecting to sheet metal duct work. DL duct flanges have rounded edges to make them easy and safe to work with and install.
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