11 X 22 3/4 Plen

Plenum R-8 Lined 11X22 3 /4X48

4 Ft R-6 Plenum

Supplenm 18-5/8X21-1/4X 36 Wr6

Plen Supunins 18-5/8X21-

Supplenm 30-5/8X21-1/4X 36 Wr6

Plen Supunins 30-5/8X21-

Supplenm 13X19-3/4X36 W /R-6

Plen Supunins 13X19-3/4X 36

Supplenm 16X19-3/4X36 W /R-6