27-3 Channel Balance

Hello,

The 27-3 stamp balance would correspond to the S395-28 (2730) channel balance. Review the specifications to confirm it's a match. 

Close up view of the S395 balance top.

Close up view of the S395 balance shoe.

As for the 28-4 balances, I'd recommend double-checking the length of the metal channel since the 28 stamp would generally correspond to a 29" long balance. If the end fittings match and the channel measures exactly 28" long, you'll need to weigh your sash to determine which option you'll need. There is a chart on the product page that explains how to choose your option based on the sash weight. Thanks for posting!