Replacement window balance component

Hi Leoni, thank you for posting,

It appears you have either our Series 351, with a 15-002 bottom attachment, or Series 390, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. 

You will need a 25" balance with a 2440 stamp option. For the top sash guide, please review the dimensions of the 18-039. Let us know what you think and if you have any additional questions. 

Comparison of the S351 and S390 balance shoes.