Construction and durability: Thickened 304 stainless steel body with a polished finish—waterproof, rustproof and suitable for both indoor and outdoor use. The robust material resists corrosion and regular wear so the hood maintains its appearance and function over time. Weather protection: A rounded cap design deflects most rainwater, while the 45° louvre grille provides a second barrier against driving rain and cold drafts. Together these features reduce moisture intrusion and help keep ducts dry. Pest and debris defense: Builtin precision filter catches leaves, dust and small animals before they enter the duct system. This prevents blockages and foreign objects from reaching indoor spaces, helping vents remain clear and ventilation steady. Secure fit and adjustability: Barbs on the ballcap nozzles grip the duct interior for a firmer hold. The nozzle design allows diameter adjustment for a snug fit and prevents the cap from slipping or falling off during use. Key benefits — why you need it: Protects vents from rain, debris and pests to reduce maintenance and prolong duct life. Keeps indoor air pathways clear and ventilation operating smoothly. Suitable for a wide range of ventilation and exhaust applications thanks to durable 304 stainless steel construction and secure mounting features. Typical applications: Exterior wall or roofmounted kitchen and bathroom exhaust vents. Laundry or dryer exhaust outlets where lint and moisture need to be kept out of the ductwork. Ventilation terminations for HVAC or attic systems to block pests and weather while maintaining airflow. Material: thickened 304 stainless steel. Functions: rain protection, debris and animal exclusion, secure duct attachment, corrosion resistance.