Aerostar 16 3/8x21 1/2x1 MERV 11 Air Filter， 16 3/8" x 21 1/2" x 1"， Made in the USA， Pleated (Pack of 6)</br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/51YLJOShbTL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51%2Bde4KVLSL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/513H0xNKAkL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/419fKXZ8JpL.jpg' noproxy></br>