Pre-motor electrostatic microfilter with activated charcoal which protects the motor, absorbs odour and gives S-Class filtration. Suitable for X1, X2, X3, X1.1, X4, X4 EXTRA, X4 PET, X4 EXCEL, X5 EXTRA, XP2, XP3, X1.1 ECO, X4 EXTRA ECO, X4 PET ECO, X5 EXTRA ECO, EVOLUTION 300, EVOLUTION 350, EVOLUTION 450. Regularly changing the filters prolongs the life of the machine and ensures optimum performance. Sebo x Series micro & Charcoal filter. Check the compatible with list to see what machines this part fits.