Sash stop for window

A quick learner from Atlanta says:
May 14, 2018
this part fits in the top of the sash channel and appears to be an upper limit stop for the channel balance

it is made of plastic
dimensions are 1" x 1" on the left side of the "C" and depth is 7/8"
Thumbnail of the uploaded file named window part.jpg
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Casey from SWISCO responded:
May 18, 2018

Hi there- thanks so much for posting!

Although we don't have this exact sash stop, our 55-043 should work as a replacement. This 4" stop should fit in your window track. Let us know what you think and get back to us if you have any questions. 
4" Sash Stop
4" Sash Stop
55-043
$1.81
How to replace the Keller Series 303 Window Balances
How to replace the Keller Series 303 Window Balances
GUIDE
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