need replacement block and tackle- not sure what attachments though

Thanks for your patience during these busy holidays. What you have here is a special extended-travel channel balance, named for its unique block and tackle configuration. That means that none of our standard Series will work for you and this has to be a custom order, instead.

The good news is that I'm very familiar with your model. While it's not a stock part, it's far from uncommon, and I know just what you need to replace it. Can you just confirm the length of the metal channel? It should be 26-7/8", not 27". Can you also tell me how many you needed? 

Once I have that data, I will email you a purchase link and price quote that you can use to place an order on our site.