Lomanco BIB12B Rigid Spider Turbine Aluminum Ventilator, Black SummerEndSale tubes or funnels are needed

tubes or funnels are needed

WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harms

Fill the mold with concrete mix

so it won't chafe

Bottom tray for storage

Lomanco BIB12B Rigid Spider Turbine Aluminum Ventilator, Black SummerEndSale tubes or funnels are neededHighlights: Type: Rigid Spider Air Veocity: 110 Mph Material: Aluminum Vent Hole Size: 12" Base Size: 20" x 20" Standards: TDI, Miami Dade County Approved Special Features: 12 12 Roof Pitch, 302 Stainless Steel Ball Usage: for residential use only Forever guarantee residential use only Approved for all tile and slate roof construction Permanently lubricated upper and lower ball bearings that ensure long life and no maintenance All aluminium rust free