1. screen type : Derrick-500 2. screen size : 1050*697*20mm 3. ... strength,and strong solid.2.Flat surface, remarkable filtrability.3. Long service life ,environmental protection and energy saving. ... ,superiority performance,convenient installment,long service life,environmental protection and energy saving,each index of this product ... to clients' designs. Hot selling Derrick-500 plate and pyramid screen