Zortrax ZGLASS Transparent Z-Glass 3D Printer Filament, 800 g Spool, 1.75 mm, Translucent Engineered for use with Zortrax M200 3D printers (requires Hot end V2) Translucent thermoplastic copolyester mixed with glass fiber High tensile strength Resistant to high temperatures, abrasion, salt, acid, and alkalis