TPU-1KG 1.75 3D Printer Filament, Dimensional Accuracy +/- 0.03 mm, 1kg Spool,Gray

I have printed dozens of masks out of TPU that I had ordered before things hit the fan here in the US. this is the first TPU I have used, and it took me a bit to get the settings figured out, but once I did it worked great and has been very reliable! The settings I found work best with my Ender 3 Pro are:215C for the hot end65C for the print bed35mm for print speed on the walls45mm for infill20mm for bottom layersI hope you have great results!

Very happy with this filament for printing things that need some flex. I don't think it is as flexible as some other filaments, but is incredibly strong and prints very well as long as your print is well supported. I am printing using and Anet A8 and was concerned about the filament bunching up going into the extruder. That hasn't been a problem at all. I've printed motor protectors/landing skids for my drones and they were perfect. I printed a keytag and it was nice that it had some flex and was soft. I also printed a toy horse for my grand daughter and it is really strong, but has some flex so it won't break at the smaller parts like PLA or ABS would. Glad to have this in my arsenal. I'm printing at 200C extruder, 70C bed temp, 40mm second, and 105% extrusion rate.

The Good: Nice black appearance, prints come out looking good...when they come out.The Bad: Diameter is undersized consistently, use about 112% feed just to get normal layers.The Ugly: First - with any TPU, disable retract, slow your feed rate a bit, and for this TPU especially, use the higher end of the temp range. That said, this TPU has been more cumbersome than most. Layer adhesion is sub-par, and for some reason I keep getting wrinkles in the finished prints - the material will flex after cooling - significantly. Maybe 1 in 5 prints was usable.

The most important thing to know is that this is more of a semi-flex. Meaning it's like hard rubber rather than flexing a lot (Also dependant on what infill you use tho). This can be a pro or a con, depending on your intended use.I have an Ender 3 with a direct drive mod.EDIT 2:I've been printing with this filament for quite a bit now, and I am stunned by the quality of my prints. The layers look perfect, the prints come out strong and beautiful. All I had to do was dial in my Cura profile. I am getting significantly better looking prints with this filament than with any of my PLA!If you're looking for semi-flex filament, this is definitely for you! Absolutely stunning.EDIT:Updating my review.After a whole lotta profile tweaking and research, I managed to print it well!I now print it at 200 hotend, no heated bed, and 30mm/s speed, as well as 110% flow rate.Retractions should be kept to a minimum but not completely disabled. When I disabled retraction I got a lot of very hard to remove stringing.My benchy came out basically perfect after swapping to these settings, and I recommend this filament for sure, if you are going to use it for practical parts, rather than flexible parts.I̶ ̶p̶r̶i̶n̶t̶e̶d̶ ̶a̶t̶ ̶1̶9̶5̶ ̶h̶o̶t̶e̶n̶d̶,̶ ̶5̶0̶ ̶b̶e̶d̶,̶ ̶a̶n̶d̶ ̶2̶5̶ ̶m̶m̶/̶s̶ ̶p̶r̶i̶n̶t̶ ̶s̶p̶e̶e̶d̶.̶ ̶G̶e̶t̶t̶i̶n̶g̶ ̶t̶o̶ ̶p̶r̶i̶n̶t̶ ̶w̶i̶t̶h̶ ̶i̶t̶ ̶w̶a̶s̶ ̶a̶ ̶b̶i̶t̶ ̶o̶f̶ ̶a̶ ̶c̶h̶a̶l̶l̶e̶n̶g̶e̶,̶ ̶a̶n̶d̶ ̶i̶t̶ ̶t̶e̶n̶d̶s̶ ̶t̶o̶ ̶u̶n̶d̶e̶r̶e̶x̶t̶r̶u̶d̶e̶ ̶o̶n̶ ̶o̶v̶e̶r̶h̶a̶n̶g̶s̶ ̶a̶n̶d̶ ̶b̶r̶i̶d̶g̶e̶s̶.̶ ̶I̶ ̶p̶r̶i̶n̶t̶e̶d̶ ̶a̶ ̶c̶a̶l̶i̶b̶r̶a̶t̶i̶o̶n̶ ̶c̶u̶b̶e̶ ̶a̶n̶d̶ ̶i̶t̶ ̶c̶a̶m̶e̶ ̶o̶u̶t̶ ̶a̶l̶m̶o̶s̶t̶ ̶p̶e̶r̶f̶e̶c̶t̶ ̶l̶o̶o̶k̶i̶n̶g̶,̶ ̶e̶x̶c̶e̶p̶t̶ ̶i̶t̶ ̶h̶a̶s̶ ̶a̶ ̶g̶a̶p̶ ̶b̶e̶t̶w̶e̶e̶n̶ ̶t̶h̶e̶ ̶i̶n̶f̶i̶l̶l̶ ̶a̶n̶d̶ ̶w̶a̶l̶l̶s̶ ̶o̶n̶ ̶t̶h̶e̶ ̶f̶i̶r̶s̶t̶ ̶l̶a̶y̶e̶r̶.̶ ̶T̶h̶e̶ ̶b̶e̶n̶c̶h̶y̶s̶ ̶I̶ ̶p̶r̶i̶n̶t̶e̶d̶ ̶w̶o̶u̶l̶d̶ ̶l̶o̶o̶k̶ ̶p̶e̶r̶f̶e̶c̶t̶,̶ ̶b̶u̶t̶ ̶(̶o̶n̶l̶y̶)̶ ̶t̶h̶e̶ ̶p̶l̶a̶c̶e̶s̶ ̶w̶h̶e̶r̶e̶ ̶t̶h̶e̶r̶e̶ ̶a̶r̶e̶ ̶o̶v̶e̶r̶h̶a̶n̶g̶s̶ ̶o̶r̶ ̶b̶r̶i̶d̶g̶e̶s̶ ̶(̶s̶u̶r̶f̶a̶c̶e̶ ̶t̶h̶a̶t̶'̶s̶ ̶o̶n̶ ̶i̶n̶f̶i̶l̶l̶ ̶a̶s̶ ̶w̶e̶l̶l̶)̶ ̶h̶a̶v̶e̶ ̶s̶e̶v̶e̶r̶e̶ ̶u̶n̶d̶e̶r̶ ̶e̶x̶t̶r̶u̶s̶i̶o̶n̶,̶ ̶w̶h̶i̶c̶h̶ ̶s̶e̶e̶m̶s̶ ̶t̶o̶ ̶b̶e̶ ̶t̶h̶e̶ ̶b̶i̶g̶g̶e̶s̶t̶ ̶s̶t̶r̶u̶g̶g̶l̶e̶ ̶o̶f̶ ̶t̶h̶i̶s̶ ̶f̶i̶l̶a̶m̶e̶n̶t̶.̶ ̶ ̶T̶h̶a̶t̶ ̶s̶a̶i̶d̶,̶ ̶I̶ ̶h̶a̶v̶e̶n̶'̶t̶ ̶t̶r̶i̶e̶d̶ ̶u̶s̶i̶n̶g̶ ̶s̶u̶p̶p̶o̶r̶t̶s̶ ̶y̶e̶t̶,̶ ̶a̶n̶d̶ ̶w̶i̶l̶l̶ ̶p̶r̶o̶b̶a̶b̶l̶y̶ ̶u̶p̶d̶a̶t̶e̶ ̶t̶h̶e̶ ̶r̶e̶v̶i̶e̶w̶ ̶o̶n̶c̶e̶ ̶I̶ ̶d̶o̶.̶ ̶T̶h̶i̶s̶ ̶f̶i̶l̶a̶m̶e̶n̶t̶ ̶s̶h̶o̶u̶l̶d̶ ̶b̶e̶ ̶v̶e̶r̶y̶ ̶u̶s̶e̶f̶u̶l̶ ̶f̶o̶r̶ ̶p̶r̶i̶n̶t̶s̶ ̶t̶h̶a̶t̶ ̶r̶e̶q̶u̶i̶r̶e̶ ̶i̶m̶p̶a̶c̶t̶ ̶r̶e̶s̶i̶s̶t̶a̶n̶c̶e̶,̶ ̶a̶n̶d̶ ̶I̶ ̶w̶i̶l̶l̶ ̶p̶r̶o̶b̶a̶b̶l̶y̶ ̶u̶s̶e̶ ̶i̶t̶ ̶a̶ ̶l̶o̶t̶ ̶f̶o̶r̶ ̶p̶r̶a̶c̶t̶i̶c̶a̶l̶ ̶p̶a̶r̶t̶s̶.̶ ̶C̶o̶n̶s̶i̶d̶e̶r̶i̶n̶g̶ ̶t̶h̶e̶ ̶r̶e̶l̶a̶t̶i̶v̶e̶l̶y̶ ̶c̶h̶e̶a̶p̶ ̶p̶r̶i̶c̶e̶,̶ ̶I̶ ̶a̶m̶ ̶q̶u̶i̶t̶e̶ ̶s̶a̶t̶i̶s̶f̶i̶e̶d̶ ̶w̶i̶t̶h̶ ̶t̶h̶e̶ ̶r̶e̶s̶u̶l̶t̶s̶ ̶I̶ ̶g̶o̶t̶ ̶s̶o̶ ̶f̶a̶r̶,̶ ̶a̶n̶d̶ ̶w̶i̶l̶l̶ ̶k̶e̶e̶p̶ ̶t̶r̶y̶i̶n̶g̶ ̶t̶o̶ ̶o̶p̶t̶i̶m̶i̶z̶e̶ ̶m̶y̶ ̶p̶r̶o̶f̶i̶l̶e̶ ̶f̶o̶r̶ ̶p̶r̶i̶n̶t̶i̶n̶g̶ ̶w̶i̶t̶h̶ ̶i̶t̶.̶

The filament came nicely packaged in a vacuum-sealed bag that also contained a desiccant gel packet. I expected that I would be able to pop it on the spool holder and get decent prints right away.Unfortunately that was not the case.The pictures attached to this review shows my first 3 prints with this filament. In the first, The two cubes on the left are the initial flow calibration prints; the leftmost measured as over-extruded by 15% and the one in the middle was "calibrated" accordingly. The surface texture was terrible, though, as you can see from the picture.The following morning I dropped the spool in my dehydrator and left it in there for a couple of hours. The rightmost cube is the result. Nice and smooth, and now apparently under-extruded by 15%!The second picture is another shot of the rightmost cube in proper focus.TPU is very hygroscopic, but I would not have expected a factory vacuum-sealed package to be so moist. Make sure you dry this filament before you use it!

This may be the ideal flexible filament if you are not looking for or needing super flexible material like Ninjaflex. The Priline TPU is easy to print and doesn’t pop out of the stepper motor gear like other TPU as it has a little more firmness so it does bend easily causing the frustrating pop outs during print. I print mine at about 230C with great adhesion to the bed heated to 50C and little to no stringing even with retraction. Some people say don’t use support with TPU but I have great success with this TPU and the support separates easily and cleanly from the main body. The model finishes clean with little to no post printing work for cleaning up. Price is almost half of some other popular brand of TPUs. Great product and value.