San-Aire Industries FILTERX4 is a high-quality filter set designed for optimal performance in tray dryers. Each filter measures 6" x 20" x 3/8" and is washable for extended use, ensuring cost-effectiveness and sustainability. This set includes four filters, compatible with models PD-100M, PD-100MCORR, and PD-100F. Enhance your drying efficiency and maintain air quality with these durable, easy-to-clean filters.