FK-4115B Safety Air Filter P776623

FK-4115B Inner Safety Air Filter

The FK-4115B is the smaller inner safety filter used with the FK-4115 air cleaner configuration. It provides secondary protection behind the larger FK-4115A primary filter.

It cross-references OEM number 11S1-20121, Donaldson P776623, Fleetguard AF25741 and Santian number ST727B.

Product Identification

This page is for the FK-4115B safety element only. It does not have the external air guide fins found on the larger FK-4115A primary filter.

Before ordering, compare the original filter number, outer diameter, inner diameter and overall height with the existing safety element.

Related Primary Filter

For the larger primary filter with air guide fins, please view the FK-4115A P776615 air filter page or send both filter numbers when requesting a complete set.