From the manufacturer Push Plastics:
PMMA or Poly(methyl methacrylate) or more commonly know as acrylic or plexiglas 3D printing filament.
PMMA is commonly used as a replacement for glass and is very clear in it's natural form. This material also has the ability to be acetone smoothed to give a truly clear print!
Recommended Print Settings:
Pairing Great with our enclosures, Get your's today