Breathe Naturally Replacement for Hunter 30901 16"x30" Pre-Filter for HEPAtech Quiet Flo Air Purifiers for Models 30901, 30903, 30907, 30958,30959 Replacement for Hunter Model 30901, 30903, & 30907 Dimensions: 16" X 30" Includes 1 cut-to-fit carbon pre filters Helps remove large particles and reduce common household odors Made in the USA by Breathe Naturally Replacement Filters