Spring Balance

Hello,

The assembly shown in your photo resembles the 15-102 subtle side load carrier. This part is used with the Series 145 Coil Balance Springs. Take a look and review the specifications below and the related parts shown in our product pages to yours. Thanks for posting! 

Alternate view of 15-102

Alternate view of 15-102

Sure, have you seen the S145 coil springs that we mentioned? If the stamp on the base of your original springs broke off, you will need to weigh your sash and divide the weight by the number of coils on both sides of the sash to choose the correct strength options.