DuraVent 6" Up Through the Roof Kit. It is a modified version of the 6DP-KBSC that combines the Attic Insulation Shield and 11" Ceiling Support box into a 23" Ceiling Support Box and Enlarged Storm Collar, simplifying installation. It replaces the 6DP-KMFG kit. Made from durable 28-gauge galvanized steel, this kit is UL listed and backed by a limited lifetime warranty. Suitable for flat or vaulted ceiling installations, it requires a 2-inch clearance to combustibles.

• Modified version of the 6DP-KBSC
• Exchanges the Attic Insulation Shield & 11 in. Ceiling Support box for the 23 in. Ceiling Support Box & Enlarged Storm Collar creating a Support Box & Attic Insulation Shield in one to simplify the installation.
• Also replaces the 6DP-KMFG kit.
• Made of galvanized steel and has a 28 gauge.
• UL listed
• Limited lifetime warranty.