1/4 in. FPT x 1/4 in. Dia. FPT Galvanized...
12 in. W X 12 in. H X 1 in. D Fiberglass 1 MERV...
3/4 in. FPT x 3/4 in. Dia. FPT Galvanized...
3/4 in. FPT x 3/4 in. Dia. MPT Galvanized...
3/8 in. FPT x 3/8 in. Dia. FPT Galvanized...
