27 3 FV CMC 7

Unfortunately, that balance stamp only helps us verify the length of 27". To identify the balance itself, use our channel balance guide. To identify the stamp option, weigh your window sash and consult the table on the webpage of the channel balance you end up selecting.

A stamp of 27 3 usually corresponds to our 2730 option, but you can always weigh your sash to confirm. `