Have added them to my business contacts.
I've only been using them for a couple of weeks but the fit is good and they are as good as OEM.
Vacuum motor gasket. Fits Nilfisk Advance BA 750ST, BA 850ST, CMAX 28ST, Convertamax 20/26
Fits Aftermarket Nilfisk Advance 56397307This part is listed as fitting the following models: