The product is a 2 pack of post filters and 2 pack of pre filters replacement specifically designed for Dyson DC41, DC65, and DC66 vacuum cleaners. Made of plastic, these reusable filters are compatible with Dyson brand vacuums and come with a total of 4 pieces. The post and pre hepa filters are included in the package, and the product dimensions are 6.88"l X 6.88"w X 1.47"h. The brand of the product is Lemige, and the filters are designed for the specified Dyson models.