4 to 3 Inch Duct Reducer, Hon&Guan Galvanized Steel Duct Increaser 4 to 3 Duct Reducer for 3/4 Inch Duct, Inline Duct Fan, Grow Tent Ventilation System-Black. Hoes 9% cleaner than an unprotected

9% cleaner than an unprotected surface

Brand: POHGNSUX

WIDE OSCILLATING ANGLE - A 3

WRF555SDFZ11

4 to 3 Inch Duct Reducer, Hon&Guan Galvanized Steel Duct Increaser 4 to 3 Duct Reducer for 3/4 Inch Duct, Inline Duct Fan, Grow Tent Ventilation System-Black. Hoes 9% cleaner than an unprotectedBrand: Hon&Guan Color: Black Features: APPROPRIATE SIZE: On one side there is a 99mm Female Spigotinner: 98mm Will fit into 4'' dust collection hose 4 inch fan. On the other side there is a 74mm(inner: 73mm) Male Spigot Will fit into 3 inch duct exhaust fan. DURABLE MATERIAL: 4 inch to 3 inch duct reducer made of galvanized steel, which is stronger and more resistant to high temperatures than ordinary plastic or pvc duct reducer, and is suitable for