Hydroponics Inline Centrifugal Fans-steel 1.This fan made of steel,greatly reduces the noise. 2.Superior air & sound performan Hydroponics Inline Centrifugal Fans-steelThe Centrifugal Fan made of steel, not only looks beautiful, but also greatly reduces the noise.Superior air & sound performance!The motor is made from Japan. High performance.Quiet volume.Wide size and air flow range Inline ...