Wheel Diameter: 4" - 5"Material: Plastic CompositeFits All Bosch AG40, AG50 And 1800 Series 4", 4-1/2" And 5" Angle GrindersDust 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