Jack

Thanks for posting. The pivot shoe might be our 15-219, but please compare with the diagram below to confirm. Let me know if anything differs.

Dimensions for 15-219

For the spiral balance, if the outer tube is indeed 3/8" in diameter, see the S900-27. That White Tip is from a rating system we do not use. To know what color tip to select, weigh the window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option under the product description of the S900-27 product page. let me know if you have further questions.