Nilfisk Coupe and Coupe Parquet and Coupe Neo vacuum cleaner pre-filter holder.
It's just the plastic grid filter holder that hold the pre-filter behind the dustbag, in the dustbag compartment. It's shown pictured lower right. The black (or white) square pre-filter that goes in it, is supplied with the packet of genuine dustbags Pn. 78602600
THERE IS NO pre-filter with this part! IT'S JUST THE BLACK GRILL!
The second picture shows the grill, AND the pre-filter, which is supplied with the genuine dustbags.