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.
Tank gasket. Fits Clarke CA30 20B and Viper AS430C, AS510B, AS5160, AS5160T
Fits Nilfisk Advance VF90504 (alt # vf90504)This part is listed as fitting the following models: