KARCHER Cleaning Agent Dosage Kit, Wall Mounted DS 3 2641811KARCHER Cleaning Agent Dosage Kit, Wall Mounted DS 3 Order No. 2. 641 811. 0 Directly connectable with the tab, water and detergent will be filled in the fresh water tank in the preset mixture. Can also be used with filling system kit. Compatable with: B 150 R, B 250 R, B 250 R I, B 40 W Dose (Disc brush), B 40 W Dose (Roller brush), B 60 W, B 60 10 C Mopvac, B 80 W, B 90 R Adv Dose, B 90 R Classic, BD 30 4 C Bp, BD 38 12 C Bp, BD 43 25 C Bp, BD 43 35