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Electric Vacuum Pen From Aquarium Air Pump.

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Step 42: Whisper 100

Picture of Whisper 100
The Whisper 100 with the suction cup also couldn't previously pick up coins.  But with the 5mm suction cup on the end, it had no problem with any of them.  Again, you still need a flat surface, and it couldn't pick up objects with too round of a surface still.  But picking up and releasing the coins was a breeze.

 
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