16-1/2 x 24-1/2 x 24 in RA Plenum with 1 in Liner Cap 26 ga

20 x 24-1/2 x 24 in RA Plenum with 1 in Liner Cap 26 ga

Return Air Plenum, 1 in Lined, 23 x 20 x 24, 26 ga

Supply Air Plenum, 13-1/2 x 11-1/8 x 36 in, For GE Small Packaged Unit

Supply Air Plenum, 14-1/2 x 19-1/2 x 36 in, For GE 21 in Air Handler

Supply Air Plenum, 14-1/2 x 16-1/2 x 36 in, For GE 17 in Air Handler

Return Air Plenum, 19-1/4 x 21 x 24 in, For GE 21 in Air Handler

Supply/Return Air Plenum, 19-1/8 x 11-1/8 x 36 in, For GE Large Packaged Unit

Return Air Plenum, 13-1/2 x 23 x 24 in, For GE B Cabinet

Return Air Plenum, 16-1/4 x 21 x 24 in, For GE 17 in Air Handler