The Telescopic Vent Square to Round Adaptor 4 Ø is a crucial component for any venting system that requires a seamless transition from square to round ducting. Made with durable materials, this adaptor ensures long-lasting performance and compatibility with standard 4 ventilation systems. Its telescopic design allows for a more flexible and convenient installation process, making it ideal for a variety of construction and DIY projects. Whether youre building a new vent system or upgrading an existing one, this adaptor provides reliability and efficiency in managing airflow.