This 4-inch flexible cuff for dust control and durable stainless steel hose clamps, making it perfect for connecting different sized dust collection hoses and ports. This transitions between 4-inch and 2-1/2-inch dust collection components, helping maintain proper airflow and suction throughout your workshop setup. The included stainless steel hose clamps ensure secure, leak-free connections that stay tight during operation. The sturdy construction and precise sizing make this reducer an essential component for optimizing your dust collection setup and maintaining a cleaner workspace.