1 3D roller 2 plastic extruder 3d roller Grating design 3 60 lines, 76 lines, 4 90 lines, 100 ... lines. 5 plastic extrusion 3d roller 1,Grating design has: 60 lines, 76 lines, 90 lines, 100 lines ... , pictures for reference, according to the project. plastic extrusion 2,Grating design has: 60 lines, 76 lines, 90 lines, 100 lines ...