Marble Run Ramp and Spacer Tuber
thingiverse
I'm designing a Marble Run ramp and spacer tube. You can find various versions on TV, but I couldn't find any that matched the dimensions of my old set. None of those models could be scaled up to fit my set correctly, so I decided to create one myself. The overall length is approximately 163mm, and each tube has an outside diameter of about 34mm.
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