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12mm Hexagonal adapter
Necessary to join the wheels ROBMR81, ROBMR82 and ROBMR83 with Motors whose shaft is 4mm
Axis: 4 mm
ROBMR81
85 mm 4 WD - 2 WD Wheel - Blue
ROBMR82
85 mm 4 WD - 2 WD Wheel - Red
MM11004
Medium Motor 20 mm 6 Vdc - 96 rpm