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. Fits Viper Fang 20, Fang 20T, Fang 24T/26T/28T
Fits Nilfisk Advance VF82121 (alt # vf82121)This part is listed as fitting the following models: