Dayton Steel 21"W 5"H Roof Curb Increaser 3AZK8 - 1 Each
$365.66
Roof Curb Adapter, Adapter Type Increaser, For Fan Base Size 18 1/2 in, For Curb Size 21 in, Material Steel, For Fan Type Downblast Fans, Filtered Supply Fans, Upblast Fans, Curb Side Width 21 in, Fan Side Width 18 1/2 in, Finish Galvanized, Function…