Andersen sash balancer for 200 Series Tilt-Wash double hung windows manufactured 2000 to present. For units with 2.2 etched on non-tempered glass - Size 2450; also fits units with 3.0 etched on tempered glass - Size 2050
Confirm your balancer by locating the stamped number on your balancer and making sure it matches the number stamped on this balancer: M750. 

Allows for smooth operation and maintains the position of the window sash. Located in the sides of both the upper and lower window sash.

NOTE: This is a special order item and could take 4-6 weeks for delivery. No returns on this item.

Watch Video: 200 Series Tilt Wash Balancer Replacement