Casey from SWISCO responded:
December 17, 2019
Both our S351-18 and S390-18 channel balances look compatible with what you have. The only difference between these two parts is the depth measurement of the bottom balance shoe. The depth measurement of the bottom shoe is 1" and for the Series 390 is 1-1/8". Measure the depth of your bottom shoe, like in the diagram below to determine which of the two balances would make the better match. Whichever one you choose will go with a 1740 option. 72 |