【7"to 4"Galvanized Steel Duct Reducer】: Precision-engineered concentric reducer connects 7 inch and 4 inch ventilation pipes. Crimped ends ensure secure fitment with pipe clamps or foil tape. 【Airflow-Optimized Taper Design】: Flanged concentric taper reduces turbulence and pressure loss in HVAC/exhaust systems. Crimped pipe ends enhance grip while maintaining smooth airflow transition 【Versatile Ventilation Adapter】: Ideal for dryer vents, kitchen exhausts, bathroom fans, grow tents, dust collectors, and industrial ducting. Compatible with round ducting systems. 【Corrosion-Resistant & Easy Install】: Galvanized steel construction withstands moisture and corrosion. Simply insert pipes and secure with clamps/tape for airtight sealing. 【HVAC System Solution】: Designed for seamless integration into 7" and 4" duct assemblies. Confirm your pipe sizes before ordering for perfect fitment. 【7"to 4"Galvanized Steel Duct Reducer】: Precision-engineered concentric reducer connects 7 inch and 4 inch ventilation pipes. Crimped ends ensure secure fitment with pipe clamps or foil tape. 【Airflow-Optimized Taper Design】: Flanged concentric taper reduces turbulence and pressure loss in HVAC/exhaust systems. Crimped pipe ends enhance grip while maintaining smooth airflow transition 【Versatile Ventilation Adapter】: Ideal for dryer vents, kitchen exhausts, bathroom fans, grow tents, dust collectors, and industrial ducting. Compatible with round ducting systems. 【Corrosion-Resistant & Easy Install】: Galvanized steel construction withstands moisture and corrosion. Simply insert pipes and secure with clamps/tape for airtight sealing. 【HVAC System Solution】: Designed for seamless integration into 7" and 4" duct assemblies. Confirm your pipe sizes before ordering for perfect fitment.