Buy from Amazon.com : http://cheap.waitmejapan.com/?asin=B00BTF5U4Q
Glasfloss Industries ZLP12121 ZLine Series ZL MERV 10 Pleated Filter Case of 12
Product Description :
MERV 10 Performance
Extended surface 14 pleats per linear foot
Made in the USA
Heavy-duty moisture-resistant construction
Galvanized expanded metal backing