... + /-0.1mm,roundness +/-0.05mm;(6) 1 kg /plastic spool packaging, can be automatic feed;(7) to be applied to a variety ... material, or dispose, but for quality assurance purpose.4.packaging We put each filament /spool on seal PE bag with ... engineers that specialty in color formulation ,plastic modification, packaging, quality control ,producing control, we can do according to your requirements . we have ...