Mercer windows balances

A quick learner from United States says:

These are photos of the window balances I need. I need a total of 6 balances. I also need 4 of the block wedge things that attach to the top of the window. They measure just over 2 inch. The number on the balance is. 31 6 FV CMC 0. Please let me know if you need more photos. Thank you.

User submitted photos of a window balance.
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Paul from SWISCO responded:

Thanks for your detailed photos. Start with looking into our 18-008 top sash guide as a possible match. Moving to your channel balance, see if our S385-32 channel balance could be what you're looking for. 

A quick learner from California says:
Hi I would love to place an order but don't know what options I need to choose. I need the one you sent me.
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Paul from SWISCO responded:
Sure thing! Based on your old stamp of "31 6," I'd recommend the 3160 option. You can always weigh your sash on a scale to be 100% sure this is correct.
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