Is This the 39-109B?

A quick learner from Iowa says:
Pella crank,,,,copperite,,,,,need 2,,,,,this look right?
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Bob from SWISCO responded:

Compare the size of the hole that accepts the spline. If it's 3/8" in diameter, then the 39-109B should be right. Based on the appearance, and if it's indeed a Pella product, I'm confident this is indeed the case. 

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