15" channel balance from 1999 or 2000

Hello,

Your channel balance resembles the S385-15 with a 1-3/32" deep bottom fitting as shown below. If there is no stamp on the metal channel, you'll need to weigh the window sash that it supports and follow the chart below from the balance product description to choose the corresponding strength option. Thank you! 

Stamp Option   Sash Weight Range

1410                  4 to 6 lbs

1420                  6 to 10 lbs

1430                 10 to 12 lbs

1440                 12 to 13 lbs

1450                 13 to 17 lbs

1460                 17 to 20 lbs

Close up view of the S385 balance shoe.