Tom from SWISCO responded:
August 14, 2017
Thanks for posting, Laura. I'm not sure what you need, exactly. The 39-027E operator has a straight arm, while the 39-412 operator has a bent, or "offset," arm. Both operators are technically "ellipse," that's just the rounded style of the base. You don't need to worry about that, the only important difference between them is the arm.
Assuming your dimensions are the same, then you just need to determine if your arm is straight or offset. |