General description Made of high-quality stainless steel, this adjustable ceiling ventilation system is environmentally friendly, safe, robust, and durable. With a 125 mm outer diameter and designed for a 100 mm ventilation pipe, it features a material thickness of 1.0 mm. The ventilation plate includes a locking mechanism that allows for adjustable airflow, making it easy to supply fresh air according to your needs. Technical specifications Outer diameter: 125 mm Drill hole size: 3.5 mm Compatible with: 100 mm ventilation pipe Material thickness: 1.0 mm Installation The ventilation plates are easy to assemble with their four drill holes, allowing for straightforward installation on either the ceiling or wall. They can also be easily disassembled for cleaning. Usage This adjustable ventilation system is practical for controlling the amount of air supplied to a room, making it ideal for various applications, including grilling and garage ventilation. The control valve allows for