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 | HL 150QC - Compact replacement filter with "quick connectors". |  | HL 150TF - Compact replacement filter with "threaded fittings". |
 | HL 170QC - Replacement filter with "quick connectors" |  | HL 170TF - Replacement filter with "threaded fittings" |
 | HL 170PP - Replacement filter with "push/pull fittings". |
