Contains 4 replacement carbon filters;Fits Holmes air cleaners models: HAP8615, HAP615, HAP625,HAP633, HAP650, HAP8650, HAP675RC,HAP725, HAP726, HAP750, HAP756, HAP 8756;Also fits Bionaire model air cleaners: BAP615, BAP625, BAP650, BAP1125, BAP1150, BAP1175, BAP1225, BAP1250, BAP1300;Also fits GE Models: 106633,106643,106653,106569,106853;Made in the USA.