... following characteristics:(1) high strength, good toughness;(2)density is small, when printing larger volume model ... lighter, save money;(3) cost-effective, can be processed in wide ... filament diameter range at 1.6-1.8mm/2.8-3.0mm, roundness +/-0.05mm, each spool net ... in different shelf, all categories arrange orderly.2.Productiong quality control I. we have diameter ...