Thanks for posting! I'm sorry for the confusion. The first and most important thing we need to help you identify what balances you need is the Series. This is determined by the plastic attachments you have on either end of the channel. The stamp indicates only its weight capacity, and the manufacturer is, in many cases, arbitrary. They do not tell us the configuration needed.
To get started, please take a look at our Replacement Sash Support Channel Balances
section on our site. You may also want to take a look at our tutorial video on how to best identify your channel balance.