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Square Ceiling Support Box & Trim Collar - 24" tall, 6" Diameter, DuraPlus [Triple-Wall] - 6DP-CS24
Duravent$262.366DP-CS24 is an 24 inch tall square ceiling support box and trim collar with a 6 inch diameter. This is used with DuraPlus triple wall pipe and is an OEM DuraVent venting component.