Prusa i3 x-carriage wit 8 years Printers 2236 764 Frame nut-trap reinforc 8 years Printers 1645 777 Parametric u spacer 8 years Other 1332 560 Merlin hot-end blank 8 years Printers 1832 715 Mechanical y-endstop ho 8 years Printers 2164 750 Universal rumba holder 8 years Printers 1235 653