looking for right window parts to buy

Thanks for writing in. Unfortunately when these plastic caps are broken down you need an all new balance, as they cannot be repaired or replaced. What's more, this kind of balance isn't made anymore--you can replace it with one of our tilt window channel balances. To know which none, we will need to see the bottom fitting of the balance; whatever is attached will clue us in as to the proper replacement. Many thanks.

Thanks for getting back to me. OK, we now know this is an old crossbow balance. This can be replaced by our Series 795 Channel Balance. See the video below for details.

Hi Jizhong, sure. If your old crossbow balance is 30-1/2" long, then you need the S795-30 30" Channel Balance. If your balance's old shoe is 1-1/4" wide, then you can use the shoe that comes by default with the Series 795 (our 15-195). For a 15 lb window sash, you'll want to select a stamp option of 30B. Finally, for your pivot bar, double-check your hole spacing and compare it with the 26-021. I believe this is right, but double-check to be certain, being sure to measure from the center of each mounting hole. 

All pricing is listed on the product pages, and all orders can be made via the online store. If you need anything else, just ask. Many thanks.