Window crank

A contractor from Arizona says:
Looking to replace this window crank. The gears on the wheel are stripped. It is a 25 inch wide window that opens and closes and 27 inch frame.
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Lauren from SWISCO responded:

Hello, thank you for posting! 

Your operator resembles either our 39-253LB and 39-253RB or our 39-438B and 39-439B. Please review the dimensions and the below instructional video regarding the difference between these two operators. 

39-253LB : Encore Dual Arm Operator, Sill Mount
Encore Dual Arm Operator, Sill Mount
39-253LB
$29.70
VIEW >
39-253RB : Encore Dual Arm Operator, Sill Mount
Encore Dual Arm Operator, Sill Mount
39-253RB
$29.70
VIEW >
39-438B : Encore Dual Arm Operator, Sill Mount, Low Profile
Encore Dual Arm Operator, Sill Mount, Low Profile
39-438B
$32.88
VIEW >
39-439B : Encore Dual Arm Operator, Sill Mount, Low Profile
Encore Dual Arm Operator, Sill Mount, Low Profile
39-439B
$32.88
VIEW >
How to Orient a Dual-Arm Operator
How to Orient a Dual-Arm Operator
VIDEO
WATCH >
Comparing the 39-253LB & 39-438B Operators
Comparing the 39-253LB & 39-438B Operators
VIDEO
WATCH >
Anatomy of a casement window
Anatomy of a casement window
VIDEO
WATCH >
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