18in 3/8" Spiral

A home owner from plano tx says:
Please let me know the proper spiral to order. Do I need to order anything other than spiral? Worrried about the bottom and how to connect to window. Thanks.
Thumbnail of the uploaded file named 18in window spiral.jpg
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Casey from SWISCO responded:

Hello,

Your dimensions and photo appear to match our S400-18 spiral balance. You'll need to clean the plastic tip at the end of the tube to choose the correct option. 

We also offer our 75-005 charging tool to assist with charging the spiral and attaching it to the pivot shoe. Thank you!

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