●You can smooth the surface with IPA alcohol - you can get a very fine polished surface, shiny smooth surface. Also, IPA processing can be done easily at home ●EASY TO PRINT LIKE PLA - PVB has the same thermal and mechanical properties as PLA and provides clean printing without warping or clogging. After IPA treatment, the printed parts will be stronger ●100% TANGLE FREE PROBLEM FILMENT - The latest filament produced by laser diameter control and self-winding system ensures printing success even after long periods of time. Save time and money ●PROFESSIONAL PACKAGING - The spool is dry and packed in vacuum sealed in a reusable bag so you can store it in the pack when not in use to prevent moisture absorption ●TECHNICAL SUPPORT & WARRANTY - We provide technical support to our customers. All products are hand-checked and guaranteed If you have any problems, please contact us