Spectrum Premium PCTG filament is an ideal alternative to PET-G. This filament prints as easily as PET-G, but has improved impact resistance, high stability and low shrinkage. PCTG has an HDT of 76˚C, higher elasticity and high resistance to chemicals. 3D prints made with Spectrum Premium PCTG transparent colours can achieve an almost completely transparent effect. You do not need a heated print chamber to 3D print with this filament. This is a 1.75mm arctic white filament on a 1kg spool.