Wright 07900. The top arm measures 4 inches.The back of the base has the number 7702. As you can see in the picture, the top arm is connected on top, vs. the hinge being on the bottom. We have 5 left hand and 3 right hand that need replacing.
Although we don't need these replaced and I'm not sure if this is relevant, on the arm that is not attached to the operator, but rather attached to the bottom of the window, it says: DEL MAR TORONTO???We think it was a replacement part.
Thank you,
Lisa