I am replacing the broken channel balance of the series 710 window H-R30-48x83 window. The length of the channel (steel part only) is measured 28". The width is measured 9/16", but I understand this means a 1/2" channel width. It is stamped with the following letters & numbers: 27 4 FW CMC 10.I would like to know the right channel balances I should buy from you. Included please found 4 photos. Two of them show the shapes of the plastic head and foot individually. The other two show the steel channel balance body which one photo also show the shape of the spring. Thank you in advance for your help.
Ron
