A cracked grille or missing cover looks cosmetic until you think about what it was actually doing — usually keeping something expensive protected from something abrasive. Once it's gone, whatever it was guarding takes the hit next.
This is the genuine Nilfisk Advance OEM 01780300 SAWZALL SHROUD, part number 1780300, brand new in the box. Genuine OEM covers use the correct material and the correct mounting geometry so they seal, don't rattle, and last.
Not sure this is the right cover for your machine? Send us the model and serial and we'll match it up.