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Filament 1.75mm 3D Printer PETG Accuracy +/- 0.05mm 1KG 2.2LBS Spool 3D Printers | eBay
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Amazon.com: Flashforge PETG Pro 1.75mm, 3D Printer Filaments 1kg (2.2lbs) Spool-Dimensional Accuracy +/- 0.02mm, Great for Printing Various Mechanical Parts, Waterproof Parts (Red, PETG Pro) : Industrial & Scientific
Watertight 3D printing PT1: Vases, cups and other open models - Original Prusa 3D Printers
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How to Waterproof 3D Prints
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Using Wax to Give Your 3D Prints a Smooth, Waterproof Finish - 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing