... PLA;(5) diameter of 3.0/1.75mm, variations + /-0.1mm,roundness +/-0.05mm;(6) 1 kg /plastic spool packaging, can be ... , make filament diameter range at 1.6-1.8mm/2.8-3.0mm, roundness +/-0.05mm, each spool net weight 1kg+/-0 ... and developing we have engineers that specialty in color formulation ,plastic modification, packaging, quality control ,producing control, we can do according ...