WRS Caldwell Series 250 Heavy Duty Tilt Spiral Balance – 5/8in, 55in Length,
Tired of heavy tilt windows that slam shut or refuse to stay open? The Series 250 Aluma-Tilt Spiral Balance is the heavy-duty solution you’ve been searching for. Specifically engineered for sashes weighing 30–40 lbs, this balance delivers the strength, safety, and smooth performance your windows demand. Built with a durable 5/8″ laser welded aluminum tube and precision spiral system, the Series 250 is AAMA Class 2 verified to provide at least 40% lift assistance, meaning it does the hard work for you. No more struggling with heavy windows, no more unsafe drops. Just smooth, controlled operation every time.