Searching for Sprague window parts

Hello, thank you for posting,

It appears that your window uses Tilt Spiral Balances. You could either have the Series 900 with a 3/8" tube or the Series 600 with a 5/8" diameter tube. You will need to measure the diameter and length of the white tube to determine the correct series and length. 

Once on the product page, you will also need to choose a colored tip option based on your original. Please review and let us know if you have any additional questions!