2 Sided, Five Layer Foil Laminate.  

Adjustable 4 Piece Elbow. Adjusts From Straight Through 90 Degrees.  

1-1/4" x 1-1/2" Thermoplastic No-Calk Roof Flashing, 1 Piece Construction, Double Seal Leak Free Fit Around The Vent Stack, Fit All Types Of Pile Including Cast Iron, Copper, Plastic & Galvanized,

Adjustable 4 Piece Elbow.

Used to change the horizontal direction of two sections of rectangular stack duct. 30 gauge.

Increases From 3" To 4" And Reduces From 4" To 3".

For round duct. Damper spring controlled. Removable screen.