Block and tackle balance 27 " long

Your window balance has a similar configuration to the S351-27 and S390-27. You'll need to measure the shoe's depth (front to back) to confirm the correct series.

Our 2660 stamp will support a sash weighing 30 to 33lbs but you may want to double check that your sash falls between that weight range.

Comparison of the S351 and S390 balance shoes.