The FEIN 30517029001 Genuine 27mm Dust Extraction Hose Adaptor is an original replacement hose connection for selected FEIN FMM250Q and MM300 Plus oscillating multi-tools. Designed for connecting the tool’s dust extraction system to a compatible vacuum or extraction hose, the 27mm adaptor helps provide effective dust removal during sanding and other dust-producing applications and is suitable for replacing a worn, damaged or missing original hose connector.