Spiral balance

A quick learner from Boston says:
Inquiring about which balance to order. Currently the balances I have are red, 27" long and the window weighs 15 lbs. Would it be wise to replace with blue? Is the blue a little bit heavy duty compared to the red? Please advise of which is the best route to go, thank you.
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Paul from SWISCO responded:
I personally have known contractors who tend to go with the blue tip option because they feel the extra heavy duty balance will perform and last longer with less strain on the spiral.
How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
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How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
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How to choose the proper spiral balance tip color
How to choose the proper spiral balance tip color
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How to adjust a spiral balance on a tilt window
How to adjust a spiral balance on a tilt window
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