Left and right balancers needed for an Anderson double hung window. Total sash height is ~38" and width is 28" The easiest to read number on the front face of the balancer is 11600-17 (which from reading other posts is of no help). The back corner just above a patent number has 11600-3 (also may be of no help). About the only other numbers I see are difficult to make out but may be something like J31 5??3 9-86 If the # sign referenced in other postings is about 1/2 the size of a normal digit then the 5??3 could be 5#23 but not very sure. The size of the balancer is about 3" wide by 6-3/8" long not including the tab. So far I have only removed the left balancer as the right still has a working string for the top sash.
