Stamp Number Conversion?

Question

My window balance has a stamp number of 26C USB, what is my conversion? It is 27" long, .5" depth, with a 1" winged guide.

Bob · Accepted Answer

Hello there. If the bottom nylon shoe on this channel balance is 1" deep (see the diagram below for reference), then this is an S380-27 Channel Balance. For a stamp option, choose 2630--this is equivalent to your old balance's stamp of 26C. Let me know if you have further questions.

Comparison of the S378, S380 and S385 balance shoes.