Free21mm moon plug
Thingiverse
17 model
Free
Freebutton 21mm four holes
Thingiverse
FreeX-Wing Reinforce Token - 21mm - V2
Thingiverse
FreePicatinny to dovetail (21mm to 11mm) Adapter
Thingiverse
FreeBearing Block 608 / 21mm
Thingiverse
FreeAnycubic Vyper / Kobra Max - PTFE guide clip (21mm, flat)
Thingiverse
FreeMini Desktop CNC Z-Carriage 21mm Bearing Option for LM12UU
Thingiverse
FreeEnder-3 Pro Y-Axis 21mm Extrusion Extension
Thingiverse
FreeAM8 Multi X Axis Mounts (17mm and 21mm for now)
Thingiverse
FreeImpact wrench socket TPU sleeves 17,19,21mm + custom
Thingiverse
FreeSettlers of Catan Magnetic Pieces Modular Box 21mm+2
Thingiverse
FreeAnet A8 dual round power switch (21mm) PSU bracket
Thingiverse
FreeGPS Ifligth Blitz Mini M10 V2 Size 20mm x 21mm, Antenna 18.2mm x 18.2mm
Thingiverse
FreeCNC - 21 mm linear bearing
Thingiverse
FreeLinear Ball Bearing for 21 mm/12 mm
Thingiverse
FreeA simple spacer 21 mm rods
Thingiverse
FreeSapphire S - Heatbed Surface Leveling for 21 mm Flanged Linear Bushing
Thingiverse