K K window cranks

A handy person from El Cajon Ca. says:
How to determine the length of arm.
User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
The operator you have is somewhat similar to our 39-031 and 39-032, though you will need to confirm that your measurements are the same. The only way to determine the length of your arm is to measure it.
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