Andersen 837 Narroline Sash Balancer

it came on time and worked perfectly.

Well packaged, clean, and exact replacement part for Andersen double hung window

Window is repaired. Best to use the Anderson site to make the right selection and instructions in taking window apart. This one was most helpful for me: [...]

It broke after about 5 uses. The retractor for the upper window on one side stopped retracting. It’s not a difficult installation, but it’s a pain to have to do it again after only a few uses!

No dislikes,used on window to hold window.

Was exactly what I needed and works perfect

It fit perfectly in place of thirty year old original Andersen balancer. Appears well made, and functions smoother than original balancer when it was new.

Perfect easy installation, Windows work great

Very good quality. Easier to install with a little help, but can be a one man job. Looks like original equipment from Andersen.

Yes