21x37.50x1 MERV 8 Standard Capacity NOVA Pleat - 4 PackNominal Size: 21x37.50x1 $110.76 SKU: NSS21A37K1A-4 Back $110.76 Quantity -+ Add to Cart Details 21x37.50x1 MERV 8 Standard Capacity NOVA Pleat - 4 Pack DetailsBackDetails21x37.50x1 MERV 8 Standard Capacity NOVA Pleat - 4 PackSee MoreSee Less