This will be 3D printed near you and delivered to your door by May 05
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Figure wheel. Stores and displays numbers for adding. Part of http://www.thingiverse.com/thing:7609Numbers should be written above gaps between gear teeth. 0 (zero) should be aligned so that it is at front of machine when wheel is reset. Drill center hole until fits loosely on Lego Technic axle.
Figure wheel for Difference Engine
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$ 0.00 + free delivery
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- 0 inches x 0 inches x 0 inches
- this product is 3D printed
- 16 available colors
- material is a strong plastic
- free delivery by May 05
- 0 parts
Order summary

Figure wheel for Difference Engine
Color:
Quantity:
Subtotal
$
Delivery (May 04 - May 06)
Free
Total
$