duel coil support

Question

this is a dual coil support cover for simonton window. Over all length of cover is 4.0 inches and width is 1.25 inches. Could you please help me to to pick right fit for this.
Thanks.

User submitted a photo of a coil balance.

Paul · Accepted Answer

Our 15-204 may work for you, if the coil springs are 3/8" wide. If the springs are 1/2" wide, our 15-150D cover would be better.