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Environmental protection, safety, harmless.Professional manufacturing, fine workmanship.Excellent for detailed and demanding applications. best2shop15_allwin2015 Features:Imported raw materials, high quality, non-toxic and safe to use.Fine workmanship, smooth, bright and strong, high precision.Compatible with most 1.75mm 3D pens and Printers.A wonderful gift set for kids, art lovers, or anyone interested in 3D art! A great way to inspire children's creativity and imagination, make children's li…