milguard window balancer

Thanks for posting. I'm confident we can replace this channel balance, but we'll need more information to help. That stamp just tells us the balance's strength, not its identity. To know the identity, we need pictures of the nylon fittings at either end of the metal channel--the combination your balance uses determines what kind or Series it is. Please also confirm the length of the metal channel--do not include the nylon fittings in this measurement. From there we should be able to narrow this down for you. Many thanks.