Spiral Balance Advice

A quick learner from Huntsville AL says:
October 10, 2023
I have several Spiral Balances that need replaced. I have two questions:

1. I have 3/8 balances but they have black tips. I do not see that option. Which tip should I order. My sash weighs about 11lbs. Picture of existing tube on tape measure attached.

2. I have 28.5 length balances. Should I order 28 or 29?
Thumbnail of the uploaded file named balance.jpg
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Emily from SWISCO responded:
October 11, 2023

Thanks for reaching out to us. I'm afraid no 3/8" diameter spiral balance was ever made with a black tip. You may want to triple-check that diameter to be 100% sure. It isn't possible for us to get accurate dimensions from photos of a tape measure, unfortunately.

If you're certain it's 3/8" then you would need to obtain the precise sash weight and refer to the chart under the product description on the S900-29 store page to determine the proper color option. As for the length, you can round up to 29". 
28" Series 900 Spiral Balance
28" Series 900 Spiral Balance
S900-28
$9.10
29" Series 900 Spiral Balance
29" Series 900 Spiral Balance
S900-29
$9.15
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