Replacement block and tackle and Clips

A quick learner from O'Fallon Illinois says:
July 30, 2018
I need to identify the correct block and tackle balance and also the plastic clip on the top of the window. Came out of 1980's non tilting single hung window. All are marked with what appears to be a length number in inches followed by a "D"

I will need many of the balances and also many clips.
A quick learner from O'Fallon Illinois says:
July 30, 2018
More photos of clips.

Also other ones had 2120 BSI stamped
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Tom from SWISCO responded:
August 3, 2018

For your balance, I believe you have either our Series 390 or Series 351, depending on the size of the bottom shoe. You'll have to measure the size of your shoe and reference our dimensions to confirm.

As for the top sash guide, I"m confident that our 18-159P is what you need.
Top Sash Guide Pair (LH/RH)
Top Sash Guide Pair (LH/RH)
18-159P
$6.65
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