Option for the balance channel

A quick learner from Davis Ca says:
Hi I'm not sure what option for the the balance channel should I use for my bathroom window
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Mike from SWISCO responded:
Welcome to SWISCO.com. To determine your stamp option, check the metal channel on your old balance. Is anything printed on it? If so, post it here. If not, weigh your window sash and post the weight. Either one of those can be used to identify the stamp option.
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