Universal BootUniversal Boot, 4 in L Register Opening, 8 in W Register Opening, 8 in H, GalvanizedDescriptionECCO Manufacturing™ Universal Boot, Compatible Duct Diameter: 4 in, 4 in Register Opening Length, 8 in Register Opening Width, Galvanized, 8 in Height
ECCO Manufacturing, Universal Boot, P5 Series, 094408, 4in L Register Opening
