Shanghai Major machinery Co., Ltd is engaged in developing, manufacturing and selling all kinds of plastic extrusion screw and barrel globally in large scale. We also focused on producing and selling extruders, relevant spare parts for high quality plastic board and sheet extrusion for the global clients. We have professional technical teams which have more than 20 years of experience in development, production and sale. We has always been helping the factories which used Major screws and production lines increasing production capacity by 15%.