upper sash balance block

A quick learner says:
looking for a replacement, this piece is 5/8"
Thumbnail of the uploaded file named tempImage33dGtV.gif
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Lauren from SWISCO responded:

Hello, thank you for posting!

Your top sash guide resembles our 18-073. Please compare the dimensions listed below for a good fit!

Front view of 18-073
Front view of 18-073
Profile view of 18-073
Profile view of 18-073
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