Wheel Diameter: 7"Material: Plastic CompositeFits All Bosch 1700, 1800 And 1900 Series 7" And 9" Large Angle GrindersUse Only With 7" Diamond Cup WheelsDust Collection Reduces Clean-Up Time And Provides Cleaner, Safer Air For UserRemovable Nose Piece Quickly Removes For Flush SurfacingLow Maintenance Cost With Replaceable Brush RingCompletely Tool Free Design For Ease Of UseBosch AIRSWEEP Vacuum Compatible, Plug And Play Without Using Any Adapters