Selkirk® by Duravent - Round Vent Thimble, 6 in Dia

Selkirk® by Duravent - Round Vent Thimble, 8 in Dia

Selkirk® by Duravent - Round Vent Thimble, 3 in Dia

Selkirk® by Duravent - Round Vent Thimble, 4 in Dia

Selkirk® by Duravent - Round Vent Thimble, 5 in Dia

Approved Vendors - Hex Head Bushing, 2 x 1/4 in, MNPT x FNPT, 150 lb, Malleable Iron, Galvanized

Approved Vendors - Hex Head Bushing, 3-1/2 x 3 in, MNPT x FNPT, 150 lb, Malleable Iron, Galvanized

Approved Vendors - Hex Head Bushing, 5 x 4 in, MNPT x FNPT, 150 lb, Malleable Iron, Galvanized

Approved Vendors - Hex Head Bushing, 6 x 3 in, MNPT x FNPT, 150 lb, Malleable Iron, Galvanized

Approved Vendors - Hex Head Bushing, 6 x 4 in, MNPT x FNPT, 150 lb, Malleable Iron, Galvanized