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.
Squeegee knob fixing kit. Fits Clarke Focus II L17, L20, L20 Boost, Focus II S20 and Nilfisk Advance SC3000, SC401, SC450, SC500, SC2000
Fits Nilfisk Advance 9097637000 Squeegee Knob (alt # 9097637000)This part is listed as fitting the following models: