window parts
Hi there!
Thanks for reaching out to us. This appears to be a tilt spiral balance like the 3/8" diameter Series 900 or 5/8" diameter Series 600. You'll have to measure the outer tube to determine the best match.
The pivot shoe resembles the 15-046 but we recommend you remove it from the window sash and compare the specifications to confirm.
Regarding the pivot bar, you might consider the 26-040 model along with the 26-016 spring. However, it's important to verify that the specifications match your existing hardware. We believe the spring was included as a clever way to facilitate easier removal of the sash, as detaching the pivot bar from the pivot shoe's cam can be quite tricky.