Nordic Pure 24 by 96-Inch-WAC-HP44-roll Window Air Conditioner Filter Actual Size of Air Filter: 24 x 96 x 1/4 (24 x 96 x 0.25) inches Window A/C filter bulk roll can be cut to fit most room window units Hypoallergenic and antimicrobial pleated electrostatic filter material Replace approximately every 30 to 60 days for fresh clean air Made in the USA