Product DescriptionBig Horn Blast Gates optimizes the efficiency of your dust collection system by seamlessly directing the airflow from one machine to another. Save time and hassle with the handy sliding gate; just glide the gate through the case for a thorough cleaning. Used in every dust collection system to control air flow from one machine to another, blast gates maximize system efficiency. Plastic blast gates are economically priced, have a textured surface and an easy sliding gate action. Features: Durable ABS material Effective, hassle-free, and simple to use Easy sliding-gate action 2-1/2-Inch O.D. and 2-1/4-Inch I.D. More Information Model# 11259 UPC95 WARNING California Proposition 65 Brand Big HornFrom the ManufacturerUse Big Horn's 2-1/2-Inch plastic blast gate to control air flow. Open the easy sliding gate to allow air flow only to the machine you are working with. Fits a standard 2-1/2-Inch hose. Use hose clamps (not included) for best connection.