... price & high quality 4.advanced technology double-pillar screen changer, double-column screen changerThe filtering channels of double-column four-position unit may work ... 300°C.Nearly all the polymers are fit for screen changer, such as PC, PMMA, PET, PS, PU, PP, PE, ... 5.Sheet.6.Cast film. Performance characteristic:1. The screen changer works simultaneously: when one net works, the other one replaced ...