This material can be printed on most printers, but it is highly recommended you use a direct extruder setup and not Bowden. Tips: The further the gap between your extruder and hotend, the more difficult this material will be to print. Print slow, and even slower if your extruder has a distance between itself and the hotend. 30mm/s - 60mm/s. Keep your cooling fan on for good surface quality. This material has amazing layer adhesion which will make using parent support material very difficult. It is suggested you design your part to not need support material as much as possible. TPU is known for being stringy, so it is going to be difficult to get rid of all of the stringiness/hair on the print. 90 refers to it's shore hardness of 90A.