Big Horn 4 in. Aluminum Blast Gate is an essential component used in every dust collection system to control airflow from one machine to another, helping to maximize system efficiency. This high-quality blast gate is crafted from cast aluminum, providing durability and strength, while featuring a steel gate and locking knob for secure and reliable operation. Designed for customers who prefer metal over plastic, this aluminum blast gate superior performance and longevity d to economically priced black ABS plastic options. Its robust construction ensures smooth and easy sliding action, making it a dependable choice for maintaining optimal airflow in your dust collection setup. Model Number: