Window balance replacement - non tilt-18 inch

Thanks for posting. This is an Extended-Travel Channel Balance, where the pulley system is embedded in the bottom nylon shoe, rather than the guts of the metal channel as with our standard version of these balances. These are not stock items but we can replace them for you via custom order. Can you show me a side profile view of how the bottom nylon shoe (the one with the metal clip and pulley) attaches to the metal channel? Can you also tell me how many balances you need? From there I can prepare a quote for you. 

Thanks for getting back to us. I just sent you an email with a purchase link to order a pair of these balances stamped 1740. Let me know if you have any questions prior to placing this order. Many thanks for your business.