Package includes: you can choose to purchase 1 piece, 2 pieces or 3 pieces 509229-1 822419-2 humidifier bottle valve cap, a useful tool to help you increase the humidity of the air Replace numbers: the humidifier bottle valve caps can replaces 509229, 822419, 509229-1SF, 509688, 819024, 819026, 819027, 821421-1, 822419-2 Suitable models for Kenmore: 758144071, 758144170, 758144070, 758154200, 758144150, 758296140C, 758144171, 758141060, 758144151, 758154140, 758141062, 758144530, 758144540, 758144510, 758144532, 758144520, 75815420010, 758144531, 14070, 758144533 Suitable models for Moistair Emerson Essick: 1305, HC-13030, -1202C1C, -1300, -13000, -130000, -13002, -13003, -1300C0C, -1300WC0C, -1303, -13030, -1305, -13050, -1305D, -13W1, -1405, -1409, -14050, -14060, -1407, -14070, -30030, -6000, -60000, -60001, -60002, -7002, -70020, -70021, -7005, -70050, EA-1407 Easy to assemble: you just need to screw the humidifier cover onto the humidifier, it takes only a little time which can save your energy and time