... Inner wall: above 600sq.m./8h NEW PATENT Drywall Sander Machine Construction Tool 1.Product DetailsType: SIM-JZ- III -180Voltage: 110V-230VFrequency ... Shaft: M8Instrument Components: Sander, Suction Machine, Dust Sucking Conduit, Dust Collecting Sleeve, Braces, Tube, Trigeminal Tool, and Tool Case. Title PowerWeight Revolving SpeedSander ...