... used in 3D printing, has the 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 range ... roundness +/-0.05mm;(6) 1 kg /plastic spool packaging, can be automatic feed;(7) to be applied to a ... rate , make filament diameter range at 1.6-1.8mm/2.8-3.0mm, roundness +/-0.05mm, each ...