Replacing Pella window cranks

A quick learner from Granville, Ohio says:
October 13, 2017
Hi! We have Pella windows from 1976. Are these t cranks correct for replacing the original cranks? I'm wanting to make room for blinds.
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Tom from SWISCO responded:
October 17, 2017
I'm really not sure, it would depend on the size of the diameter of the hole in your old handle. The diameter of the hole on the 39-227B is 3/8". What is yours?
T-Crank Handle, 3/8" Spline for Pella
T-Crank Handle, 3/8" Spline for Pella
39-227B
$4.21
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