View 2 of Dial Manufacturing 78318 20 X 20 Multi-Pitch Roof Jack for 5000-6500 Cfm Residential Down Draft Coolers

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View 1 of Dial Manufacturing 78318 20 X 20 Multi-Pitch Roof Jack for 5000-6500 Cfm Residential Down Draft CoolersView 2 of Dial Manufacturing 78318 20 X 20 Multi-Pitch Roof Jack for 5000-6500 Cfm Residential Down Draft Coolers