We need the part with the metal (balance?) and the one with the blue part (shoe?). Both have the number Pat 5,353,548. The metal measures 1/2 inch in width.
Bob from SWISCO responded:
October 21, 2020
This looks like a 15-087 Pivot Shoe, 15-086 Housing, and 16-024 Mounting Bracket. This system uses our Series 180 Coil Balances. Let me know if you have further questions.