Almost any Ø 12 or Ø 14 mm spark plug will fit.
I printed this model on a PRUSA Mini with PLA+, 0.15 mm layer height.
N.B. The RAW-file “Lid.stl” will fit a NGK BR8ES (4 mm extra height). The Print Profile by Carnyx is 4 mm lower, and will fit most other spark plugs.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.