Milgard Channel Balancers

A handy person from King City, California says:
I have 25 inch long channel balancer, measuring just the metal channel and not counting the plastic ends. The only number stamped in the metal is 25 3. I assume the 25 is the length of the balancer but I do not know what the 3 represents. The window weighs approx. 15 lbs. Either the balancer that is in the window is worn out or I need one that will carry a little more weight because the window is hard to open. Thank-you
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Tom from SWISCO responded:
Are you sure the metal channel is 25"? With a stamp of 25 3, the length should be 26". The stamp, 25 3, represents how much weight your balance can support.
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