Therefore, the finished granules can float on the water for about 24 hours due to being puffed. Finished particle sizes can be 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm etc up to a larger 15mm. dry type machine heating the material by electric heating plate, this dry type machnine extrudes the material from the holes of the die under the action of the screw extruder.