PLEASE REFER TO THE SASH BALNCER USAGE CHART TO DETERMINE WHAT BALANCERS YOU NEED IF YOU DO NOT ALREADY KNOW THE BALANCER NUMBER: CLICK HERE

REFER TO THE SIZE CHART TO FIND THE SIZE OF YOUR WINDOW: CLICK HERE

SOME BALANCER MODEL #'S HAVE CHANGED. IF YOU DO NOT SEE THE STAMPED MODEL NUMBER LISTED BELOW SEE THE PARTS PAGES HERE TO FIND THE REPLACEMENT #: CLICK HERE

We do recommend you replace both balancers since you have the window apart and both should have about the same wear and tear.