Andersen 100 Series Single Hung Sash Balancer Number 2565 Color / Finish_Stone|White then you will also need

then you will also need to purchase the left hand sill hinge for the hinges to work properly

Pella Left Hand RotoOperators (2002-Present) provide a sturdy replacement operator for the following Pella windows manufactured from 2002 onward: Pella Architect

Works with 100 Series Gliding Patio Doors manufactured March 15

Andersen G336 400 Series Gliding Window (Passive Sash) in Terratone

Andersen 100 Series Single Hung Sash Balancer Number 2565 Color / Finish_Stone|White then you will also needAndersen 100 Series Sash Balance Number 2565 Works with Andersen 100 Series Single Hung Fibrex windows manufactured from 2008 to present. Every balancer has the number stamped on the edge please see in image gallery. We highly recommend replacing both balancers even if only one is not operating properly. These balancers allow free and easy vertical movement of the lower active single hung sash. To visibly see the balancer you need to remove the lower