Louvers are simply placed in the wall opening behind the wood grilles. The air flow is adjusted with a regular screwdriver while the grille and louvers are in place. There is no need to disassemble to adjust. Dampers are made of metal.

geometric vent cover installation graphic
louvers
duct size Price Each $
8 x 4 24.95
8 x 6 24.95
8 x 8 24.95
10 x 4 24.95
10 x 6 24.95
10 x 8 24.95
10 x 10 24.95
12 x 4 24.95
12 x 6 24.95
12 x 8 24.95
12 x 10 24.95
12 x 12 24.95
14 x 4 24.95
14 x 6 24.95
14 x 8 24.95
14 x 12 24.95