Product review (1 stars): Not worth saving 8 bucks
If there's anything you should purchase from the original manufacturer as a replacement parts it's this piece. I spent almost a year dealing with crazy squealing until I read other forums and found out that it's about the materials used for the cord and pulley. This cheap knockoff does not glide properly and as a result will cause the spring to create a nasty harmonic sound. The genuine replacement part is only $15 elsewhere online!