Correct balance for Nuair window

Thank you for your patience with us. Take a look at both our S380-30 and S385-30 channel balance. These balances look exactly the same, with the only difference being the depth measurement of the bottom balance shoe. For the Series 380, the depth measurement is 1" and for the Series 385 is 1-3/32". Measure the depth of your bottom shoe, like in the diagram below, to determine which of the two is a better match. Whichever one chosen will go with the 2950 option. 

Alternate view of 15-004