• Comes with installed bird screen
• 10” water height - waterproof
• Cantilevered lid on gable ends to prevent leakage from gusting winds
• For roof ventilation as well as kitchen and bathroom vents on flat roofs
• Dimpled, soldered roof flanges for strength to prevent corner breaking
• All joints soldered including vertical seam on one corner to prevent leakage
• Other sizes available upon request
• 4” roof flange