Hello. We purchased an older home and are needing to replace some units. We need to replace 3 whole units and may need to purchase 3 cranks? We took pictures of what the older home but unsure what to replace with. Thanks!!
Bob from SWISCO responded:
May 13, 2020
This old crank is no longer made, but customers have been able to use the 39-411 as a substitute. Look over the dimensions and see if you think this could work for you.