Disposable Panel Type For Furnace And Central Air Systems. Metal Grid On Both Sides Gives Extra Strength. Filters Are Class Ii, Ul Approved. No. 10255.01814: Nominal Size; 8 X 14 X 1, Actual Size: 7-7/8 X 13-7/8 X 3/4 No. 10255.011020: Nominal Size: 10 X 20 X 1, Actual Size: 9-7/8 X 19-7/8 X 3/4 No. 10255.011212: Nominal Size: 12 X 12 X 1, Actual Size: 11-7/8 X 11-7/8 X 3/4 No. 10255.011220: Nominal Size: 12 X 20 X 1, Actual Size: 11-7/8 X 19-7/8 X 3/4 No. 10255.011224: Nominal Size: 12 X 24 X 1, Actual Size: 11-7/8 X 23-7/8 X 3/4 No. 10255.011230: Nominal Size: 12 X 30 X 1, Actual Size: 11-7/8 X 29-7/8 X 3/4 No. 10255.011420: Nominal Size: 14 X 20 X 1, Actual Size: 13-7/8 X 19-7/8 X 3/4 No. 10255.011425: Nominal Size: 14 X 25 X 1, Actual Size: 13-7/8 X 24-7/8 X 3/4 No. 10255.011430: Nominal Size: 14 X 30 X 1, Actual Size: 13-7/8 X 29-7/8 X 3/4 No. 10255.011520: Nominal Size: 15 X 20 X 1, Actual Size: 14-7/8 X 19-7/8 X 3/4 No. 10255.011616: Nominal Size: 16 X 16 X 1, Actual Size: 15-7/8 X 15-7/8 X 3/4 No. 102