Einhell TE HD 18 down part cartridge modification. Designed from the original of Aliexpress (https://es.aliexpress.com/item/1005001521786527.html?spm=a2g0s.9042311.0.0.274263c0SJ1hiN). With this design, the low part has been reduced and a hole is included in order to add a cablegland (pg9 size). It can be used for reducing the down-part cartridge size for using it with an external battery (li-ion, lipo, etc.). Resolution and Infill doesn't matter, it will depend of the desired hardness.