Entry Guard Truth 31538A

A handy person from Minnetonka, Minnesota says:
September 13, 2019
Need the plastic round knob that goes on the end of the operator arm (the part that fits into the window frame).
Looking from the outside of the house, this arm is on the left. Thankyou,
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Dave Sr. from SWISCO responded:
September 18, 2019

I am sure we can help you with a replacement operator. Before we can do that, may we have the size of the link arm? This will help us be able to know which replacement to recommend. 
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Dave Sr. from SWISCO responded:
September 18, 2019

Thanks for the extra information. Our 39-155 and 39-156 sound like they can be worth considering. Take a look at both parts and see if our measurements will work for you.
A handy person from Minnetonka, Minnesota says:
September 18, 2019
The entire link arm from tip to end is approximately 9 1/2" long.
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-155
$29.85
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-156
$29.85
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