Thingiverse
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Bowdenextruder 3D Printable Models
BoomBox - the best Bowden extruder on Earth
$10
Printables
Kiolia
ECAS04 magnetic bowden coupler + cap
Printables
fl0cko
Slim Bowden Extruder Mount for Rook MK1 and Legacy
MakerWorld
leclairaaron
Hero Me Documentation - Details.stl
Thangs
MediaMan3D
Ender3 Bowden Extruder Mount for Rook 180
MakerWorld
KushagraK7