Model Compatibility: Filter-Monster Air Filter Replacement are compatible with AP-1512HH, AP-1512HHS, AP-1518R, AP-1519R, and 200M Coway Airmega Air Purifiers. Replacement Time: Depending on air quality environment and usage, it is recommended to replace the filter every 12 months to help ensure the Coway Airmega air purifier is running efficiently. Dimensions: Filter-Monster Replacement with Carbon Filter Set compatible with Coway 400/400S Airmega Max 2 filter. The air filters approximate dimensions are: 1.56" x 15.00" x 15.00”. Included in the package are one (1) filter and two (2) deodorization filters. Replacement Time: Depending on air quality environment and usage, it is recommended to replace the filter every 12 months to help ensure the Coway Airmega air purifier is running efficiently. Dimensions: Filter-Monster Replacement with Carbon Filter Set compatible with Coway 400/400S Airmega Max 2 filter. The air filters approximate dimensions are: 1.56" x 15.00" x 15.00”. Included in the package are one (1) filter and two (2) deodorization filters. Filter-Monster branded replacement filter compatible with Coway AP1512HH and AP1512HHS Air Purifiers. This filter is engineered to be compatible replacement air filter for AP1512HH, AP1512HHS, and AP200. Included in the package are one (1) filter and two (2) deodorization filters.