Please help identify the replacement balance & pivot shoe for a Pella window. It is a 1/2" Block & Tackle Channel Balance that is 28" long With a marking of 28B BSI
The pivot shoe has a patten # Stamp which is 4610108 & also Patten # 6,679,000. Approximately 1 3/16" wide & 3 1/8 " long & 5/8" wide.
Thanks !