Amazon.com: Basics 3D Professional 3D Printer Filament, PVA (Water Soluble Support Material), Natural Color, 1.75mm, 0.5 Kg, Made in USA : Industrial & Scientific
Amazon.com: Polymaker PVA Filament 1.75mm, 750g Water Soluble Filament Support for PLA - PolyDissolve S1 PVA Dissolvable Filament 1.75mm Support Material for PLA 3D Printer Filament : Industrial & Scientific