can you help me identify this ,,,

A quick learner says:

i already ordered Top Sash Guide 18-033


which modle i need a 16 in and a 18 in

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Casey from SWISCO responded:


It looks like you have either our S351 , with a 15-002 bottom attachment, or S390 , with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need to find the stamps on your balance channels to choose the correcsponding spring strength options for your replacement balances. Thank you!

A quick learner says:
thank you
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