4 Inch Y Duct Splitter: Designed to divide or combine airflow through three ports. Each opening measures approximately 3.8 inches (97 mm) in outside diameter and fits compatible 4 inch (100 mm) flexible ventilation hose. Smooth Plastic Construction: Made from sturdy molded plastic with smooth interior surfaces and a curved Y-shaped airflow path that helps reduce resistance in general ventilation systems. Three Stainless Steel Clamps: Includes three 304 stainless steel worm-drive clamps—one for each port. Each clamp adjusts from 3.58 to 4.49 inches (91–114 mm) to secure compatible duct hose. Simple Three-Step Installation: Insert the connector into the ventilation hose, seal each joint with aluminum foil HVAC tape, and tighten the included clamps. Aluminum foil tape is required but not included. For General Ventilation Systems: Suitable for compatible 4 inch ducting used with exhaust fans, grow tents, workshops and air-circulation systems. Confirm hose dimensions and installation requirements before use.