Sundstrom SR221 Pre Filter (pack of 5)

Sundstrom SR221 Pre-Filter (pack of 5) protects the Sundstrom SR510 particle filter against early clogging of particles. This Sundstrom prefilter SR 221 is a disc that is designed to catch coarse particles which will extend the lifetime of the particle filters SR510. The prefilter is placed in the prefilter holder and then snapped on to the particle filter or combined filter.