This is a eraser sleeve that is designed to feel more comfy and useful then a normal one. It has varying textures on the surface so that it works as a fidget toy. For example, it has some smooth and bumpy parts. Also, the texture makes it easier to grip and use compared to a standard one. It was printed in 95A Duramic TPU with 15% infil on a Elegoo Neptune 4 Max. I prefer 15% infill, however, you can change it to feel softer or harder. It fits perfectly on a standard eraser like the one in the picture and the sleeve is the same length. I was able to print without supports standing upright. Another, thing is that some students like to rip up the normal ones, however, with this one they can't and it creates no mess. Enjoy!