Anderson casement operator 13.9-14" long arm

Thanks for reaching out! Your Andersen operator reminds me of our 39-331 E-Z Straight Arm Operator. The opposite handed version is part 39-332. To confirm that these are the right fit for your window, carefully compare the dimensions below.

Both of these operators use the 39-152 Andersen Classic Operator Cover and the 39-267 Andersen Classic Handle.

Arm length of 39-331

Measurements for 39-331

There is a chance you will need to remove the wood sill cover to properly remove and install these balances. The video below uses a different casement operator but the process described is the same. Take a look to see if this may help to make replacing these a bit easier.