Photo 1 of 14 Pack 3500 Replacement Filters for Air Doctor AD3000 Series Air Purifier, Fits AD3000, AD3500, AD3500i, Includes 2 Efficiency + 4 VOC Units and 8 Pre-Filters

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Photo 1 of 14 Pack 3500 Replacement Filters for Air Doctor AD3000 Series Air Purifier, Fits AD3000, AD3500, AD3500i, Includes 2 Efficiency + 4 VOC Units and 8 Pre-FiltersPhoto 2 of 14 Pack 3500 Replacement Filters for Air Doctor AD3000 Series Air Purifier, Fits AD3000, AD3500, AD3500i, Includes 2 Efficiency + 4 VOC Units and 8 Pre-Filters