Z6QA-200Air Drills 　 Free speed 　20000rpm 　Chuck capacity 　6mm 　Weight 　0.67kg 　Hose size 　6.3mm 　Working Air Pressure 　0.40MPa-0.8MPa 　Test Air pressure 　0.63MPa We are Zhejiang Jinyi Electric Tools Co.,Ltd. in china.We supply electric tools,water pump,grinding wheel and air tools with good quality and low price. If you have any query, Please contact us to know details.