Ultimaker 2 - Material Change Adapter

thingiverse

To swap filament on an Ultimaker 2 mid-print, you can use a plugin in Cura to pause the job at high Z. Pull the existing material straight out by hand next. Replace it with new material, again by hand. If you find that difficult, insert this adapter first for simpler insertion into the new material. Forcefully push the old filament until it ejects from the nozzle, then resume printing as usual.