Shanghai Globe screw technology co., ltd is a german organized company and our techinique and developing are supported by german company.and our machinery and testing from germany or Japan.so please do not worry about our quality control.Our airends is new design of 5:6 rotor, which can be lower noicy and higher products scode is from 2m Cube meter to 30cube meter right now.Our quality is same as GHH and rotorcomp, but we take advantage of them to get rid of their problems like high RPM, and We can offer you direct driven which GHH can not. If possible, we do welcome you to our company sincerely when you free. for further information, please view our website: Any inquiry from you are always welcome.Best Regards 2009-12-15 Jenson ChanShanghai Globe Screw TechnologyTel.:0086-21-57383073Fax:0086-21-57384988Mp.:0086-13636605675Website:Skype:Mail:;Add:No.169 SongXuan Road, North Jinshan Industrial Zone, Jinshan District, Shanghai, 201504, China.