Our package includes 1 non-powered roof ventilator with a hoop. The vent connection measures approximately 4.33 inches (11 cm) in diameter and 7.48 inches (18 cm) in height. It ensures quick and efficient release of hot air from roofs within minutes while protecting your space from rain and moisture.The non-powered roof ventilator is constructed from high-quality 304 stainless steel, ensuring durability and strength. This material resists rust and withstands high temperatures, making it ideal for various weather conditions.This roof ventilator requires no electricity to operate. It functions automatically by utilizing wind power to exhaust air continuously throughout the day. Enjoy an energy-saving solution that provides silent, maintenance-free operation without the risk of electrical faults.The unit features a tube diameter of approximately 4.33 inches (11 cm) and a turbine diameter of 7.48 inches (18 cm). Its well-designed size allows for rapid and effective airflow, helping prevent moisture buildup and stale air in enclosed spaces.Ideal for residential or light commercial use, this ventilator is suitable for installation on factories, farms, workshops, kitchens, rooftops, and homes. It also works well with chimneys that are not frequently used, contributing to a more comfortable indoor environment.Despite having no electrical components, the ventilator delivers reliable performance with fast air exhaust capabilities. It effectively protects your building from rain and excess humidity.Experience quiet ventilation with this non-powered roof vent. Designed for seamless operation, it promotes consistent airflow without generating noise. Made from durable stainless steel, it offers long-lasting rustproof and heat-resistant performance.Specifications: - Tube Diameter: 11 cm - Turbine Diameter: 18 cm - Height: 18 cm - Color: Silver - Material: Stainless Steel Package Contents: 1 x Roof Ventilator Note: Light reflection and differences in display settings may cause slight variations between the color shown in images and the actual product. Measurement error allowance is +/- 13 cm.