Excelvan 3D Printer Printing Filament 1.75mm PLA for Print RepRap MarkerBot 1kg/2.2lbs (Purple) Our PLA filaments DO NOT have air bubbles. Diameter Tolerances: Our filament quality is very good with tolerances only: +/-0.02mm. Specification: Diameter: 1.75 mm / Tolerance: +/-0.02mm / Print temperature: 190-220&#176;C (374-428&#176;F) / Bubble: No bubble 100 percent / Net weight: 1kg/spool / Gross weight: 1.3kg/spool Material: PLA allows higher print speed, more accurate placement of material with proper cooling (it does not shrink as much) and also thinner build heights because of less resistance from the plastic coming out the nozzle, where abs even at high temps (252C) is still sticky and has high viscosity. Compatible with all FDM 3D printer such as Makerbot, Mendel, Prusa, Huxley, BFB series, RepRap, Rapman, Solidoodle etc.