WTF Filter Parts are exactly what they say they are: A complete package of parts to be able to manufacture your own replacement filter for the original part you want to cross reference.
Western Technical Filter can even provide pleat packs to fit your part number of the filter you want cross referenced.
You supply the OEM part number, and you will be advised as to whether there is a parts kit available for your part number.
Select filter part category you would like information for: