975 Series

The 975 series is an inverted constant force system that can maximize your window's operating force and egress with a low inventory requirement.

product highlights

  • Recommended for:  aluminum, composite, vinyl, and wood
  • AAMA 902 Certified
  • T-head design for twist and turn installation
  • Side locking shoe made into housing
  • Open carrier design proven to reduce dust and debris build up compared to closed systems
  • Stainless steel, aluminum, polycarbonate, or nylon clips available
  • Inverted mount racking t-lock version of our 1/2" coil spring balance system, patented interlocking coils
  • Target profile: Vinyl with a 1 1/4" X 9/16" pocket
  • Easily installed
  • Minimal sku's needed
  • Can hold from 7 lbs. up to 80 lbs. and offers 35" of travel
  • Can be purchased in bulk or pre-assembled


Attribute Value
Weight Capacity 5 - 72 lbs