Manufacturer's Number: WFCB The PureSourcePlus filter fits refrigerators made before 2001, and Kenmore refrigerators with model numbers starting with 253. This filter has white ends, while the EAP503619 has blue ends. May require the EAP428513 wrench or EAP428532 O-ring. Filters for: Taste and odor Sediment 99.3% of Lead 99.99% of Cysts 99.7% of Turbidity 99.8% of Particulates (Class I) 94.9% of Atrazine (a herbicide) 94.2% of 2,4-D (a herbicide) 97.8% of Chlorine (Class I) 87.5% of Toxaphene (a pesticide)