Window balance

Hello there. Based on the end attachments, you might have either a Series 380 or Series 385. The difference between these two channel balances is the 'depth' of the bottom nylon shoe. See below. Measure your old balance's shoe depth to see what matches best.

Comparison of the S378, S380 and S385 balance shoes.

You also need to choose the correct length and stamp rating. See the video below. Let me know if you have further questions.