I have a broken window balance. Part # on the unit is 26-4 J05 CMC43.

We can supply this balance, but only as a special order due to its configuration. The key detail here is the blue "washer" connected to the spring. This tells me that your spring uses that unique calibration, which necessitates the special order.

I'll go ahead and email you a purchase link and price quote right now for 2 of these. You can then use that to place an order on our site.

Please note that these balances are not currently in stock, and so there will be a lead time of 5-6 business weeks.