Perko Cowl Ventilator - 3" Chrome Plated Zinc Alloy [0870DP0CHR] Perko Sale! from $61.81 USD /per Cowl Ventilator(0870) Chrome Plated Zinc Alloy Cowl with Black PERKO-KOTE Base 3" Duct Thread into Neck, Hose Clamps Not Required Cowl Opening Square: 7-1/3" Produc variants Default Title Qty. Add to Cart Couldn't load pickup availability Refresh