Grator Flip-flow mats are made from an engineering polymer which has extremely low moisture absorption and has a very low co-efficient of friction. These mats are designed to break or loosen the adhesive bond between the different materials during screening operations. The flexible mat provides flexing & relaxing operation there by aperture elongated and stretch or bend which helps in discharging materials. Mats can be used for classification of intermediate and fine/coarse materials.