The life of the motor on your SEBO vacuum is extended, and cost kept to a minimum, if you keep dirt and dust particles from entering its delicate mechanical workings. For this reason SEBO designed its pre-motor filters. During typical use, the air entering into your vacuum has an abundance of airborne dirt particulates that can cause wear and damage to a motor over time; however, with the SEBO 370 Comfort Pre-Motor Filter 1825, this problem is eliminated. These pre-motor filters are easy-to-change, saving you time during a hectic cleaning schedule. The SEBO 1825 Pre-Motor Filter fits the SEBO 370 COMFORT series.