Series 77t

A traditional Block & Tackle Balance for tilt applications: Caldwell’s Series 77t balance is available in both with bobbin or stirrup options and Screw or Hook mounting options.
Series 77t succeeds AAMA Class 2 with a weight capacity of 2-45 lbs and length of 6-46 inches.

Product Features

• Designed for all Tilt windows: residential or light commercial
• Caldwell’s Music Wire Springs offer reliable and consistent operation
• Positive lock, drop in system compensate for extrusion toleration and allow for tandem applications
• Available in various colors and compatible with jamb covers