Block & Tackle Balances

Thanks for posting. The difference between the three balances you mentioned is the nylon attachments. You would need to carefully look over yours and see which of the three is the best match.

Each Series comes in many different lengths. You can view all of them on our main site. You won't find a number anywhere on your window or balance that will tell you what you need. The only way to find a good match is by comparing hard, physical details. Fortunately, we have detailed pictures, information, and dimensions on our site that you can use as reference to make it easier. Let me know if you have any further questions.