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SUNLU 3D Store via Amazon [amazon.com] has 4-Pk 1KG SUNLU Silk PLA 1.75mm 3D Printer Filament for $40.79 – 10% at checkout = $36.71.
Shipping is free.[list][*]1kg*4 Red+blue+orange+red Copper, Silk Single Color [amazon.com] – $35.14[*]1kg*4 Light Gold+black+white+grey, Silk Single Color [amazon.com] – $35.99