Custom 4530 balances for 50Ibs. sash

Hello,

We'd be happy to supply your custom balances but your 4530 stamp code would generally indicate that the metal channel would measure 46" long for this type of assembly, not including the end fittings. Also, please note that a pair of 4530 stamped balances will support a sash between 19-24 pounds. Using two on each side would support a total weight between 38-48 pounds. I would recommend double-checking your balance length and sash weight to ensure that the balances will work for your application since they will not be able to be returned. You are also welcome to send us photos of an undamaged assembly removed from your window if you have any doubts that the S351 would be the correct replacement. Thank you.