You are bidding on a Rokenbok Piston Plant (also known as a Pump Station).
Dump balls into the plant's silo. Then, every time you drive under the pump wheel pistons go to work pumping and pushing balls through the plant and into the sorting quarry. The pump wheel generates all the power needed, so no batteries are required!
Works with Rokenbok trucks or monorail.
Great addition to any Rokenbok layout!
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