Smooth ventilation function for safer and controlled ventilation. Made of stable and durable alloy material. Easy installation for secure ventilation. Adjustable fit for optimal ventilation. This window ventilation fitting provides a safe and controlled ventilation solution in the home. Made of durable alloy material, the fitting offers high durability and stability, making it ideal for keeping the window in a secure ventilation position without being able to open completely. With its smooth and discreet design, it is easy to install and use on most window types. Easy adjustment for customized ventilation. The fitting is designed to allow for customized ventilation, making it perfect for creating good airflow while preventing unwanted openings. An excellent accessory to improve safety and comfort in the home. Specification - Material: Alloy - Dimensions: The center distance is 43 mm/1.7 inches, the screw size is 4 x 13 mm/0.16 x 0.51 inches (diameter*length), the metal plate length is 62 mm/2.4 inches, the latch length is 106 mm/4.2 inches.