Noll/Norwesco LLC 557145 Galvanized Roof Ventilator

Noll/Norwesco LLC 557145 Galvanized Roof Ventilator Review

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Noll/Norwesco LLC 557145 Galvanized Roof Ventilator Feature

Designed for composition or shake roofs. All parts are fastened by rivets. Large base offers added protection and ease of installation. No. 558011: RV38, 7 3 4'' baffle diameter opening, 17'' x 20'' base plate, 38 sq. in. free area No. 556157: RV38 brown, 7 3 4'' baffle diameter opening, 17'' x 20'' base plate, 38 sq. in. free area No. 558012: RV49, 9'' baffle diameter opening, 18'' x 22'' base plate, 49 sq. in. free area

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