This premium plastic reducer/increaser is designed for frequent use, maintaining structural integrity and facilitating effortless connections between different duct sizes. Ideal for bathroom fan exhaust applications, it optimizes airflow and efficiency. With 4" and 3" diameters, it fits snugly in confined spaces. For enhanced performance, apply duct tape to seal joined edges.

• Plastic construction for durability
• Connects duct quickly, easily
• Ideal for bathroom fan exhaust applications
• Tip: Seal joined edges with duct tape for increased efficiency
• Heavy-duty plastic