Small part, but the right part. On machines, "close enough" hardware and components are how repairs turn into re-repairs — factory thread, factory grade, factory fit means it goes on right the first time and lasts the way it's supposed to.
This is the genuine Nilfisk Advance OEM 01781233 DISC 3" ROLOC SUPER FINE, part number 1781233, brand new in the box. Whether it's a wear part, a consumable, or a component you don't touch often, genuine OEM is how you know you're not going to see it again next month.
Not sure this is the right part for your machine? Send us the model and serial number and we'll confirm the fit before you order.