These are the genuine replacement pleat spacers for Aprilaire and Space-Gard air cleaners, models 2400 and 5000.
This component looks like a large comb. It is designed to support the filtering media for even loading of particulate throughout the air cleaner media.
Approximately 17" x 6-1/2"
Aprilaire / Space-Gard: 2400 and 5000
Other Stock Numbers: DSG4270