What It Is: PolyLite™ PLA Pro is a first of its kind: combining high toughness and high rigidity, this professional PLA offers engineering properties with the ease of print of regular PLA. -What is the difference between PolyLite™ PLA, PolyMax™ PLA and PolyLite™ PLA Pro? PolyLite™ PLA is a very rigid material with very low impact resistance.PolyMax™ PLA is an extremely ductile material with high impact resistance and durability.PolyLite™ PLA Pro is the best of both worlds combining excellent rigidity and high impact strength. -Printing and Drying Settings? Printing Temperature: 190˚C - 220˚CBed Temperature: 30˚C - 60˚CPrinting Speed: 30mm/s - 70mm/sFan: ONDirect Drive:Retraction Distance: 1mmRetraction Speed: 30mm/sIndirect Drive:Retraction Distance: 3mmRetraction Speed: 60mm/sDrying Settings: 55˚C for 6h(Only if the material has absorbed moisture) -Does the Metallic effect affect the layer adhesion? Layer Adhesion (Tensile Strength Z axis): PolyLite PLA Pro Regular Colors: 36.49Mpa PolyLite PLA Pro Metallic Gold/Silver/Bronze (Crystal Powder): 30.12Mpa PolyLite PLA Pro Metallic Blue/Red/Magenta (Pearl Powder): 34.32Mpa For your reference: PolyLite PLA Regular Colors: 40.55Mpa PolyLite PLA Silk Colors: 20.21Mpa PolyLite PLA Carbon Fiber: 15.13Mpa PolyTerra PLA Regular Colors: 12.20Mpa PolyTerra PLA+ Regular Colors: 16.69Mpa Silk PLA are very weak because of the formula change, the PLA Pro metallic is not a formula change but a color master batch optimization, the effect on the layer adhesion is minimum. You lose 50% strength when going from regular PLA to Silk PLA. You lose 6%-17% (depending on the color master batch changes) from PLA Pro to PLA Pro Metallic. -Spool Dimensions?1kg cardboard spool: Spool Inner Hole Diameter: 55±1mmSpool Diameter: 200±1mmSpool Width: 65.6±2mmSpool Weight: 140±7g