Replacement sash balances for Kinro windows

Thanks for posting. Just as a note, the sash is actually the movable part of the window; in this case, your specific kind of balance is called a Channel Balance. Based on the information given, this looks like either a S350-30 or S385-30 Channel Balance. You're going to need to compare the top nylon attachments that come fitted with either balance Series to see which most closely matches your old balance: the Series 385 nylon caps have wings, whereas the Series 350 does not. Once you know what balance to select, you'll need to select a stamp option of 2930.