casement window crank operator

Hello, thank you for posting,

Your operator resembles the 39-253LB and 39-253RB or the 39-438B and 39-439B. The main difference between the two styles is the track slider at the end of the straight arm. Please review the video below for more details! 

Review all dimensions and orientation to confirm a good fit! 

For a cover and handle, see the 39-451 and 39-452 or the 39-375 and 39-376 depending on style preference. Let us know if you have any additional questions!