Optimize your window's performance with Amesbury Truth window sash coil spring balances – C4. Designed for smooth, dependable operation, these industry approved balances are ideal for both residential and commercial windows. Enjoy stable sash support, effortless opening and closing, and lasting durability. Easy to install, each balance supports up to 24 lbs (with three per side) and features a clean white finish. Perfect for DIY upgrades or professional repairs, these balances ensure your windows deliver lasting comfort, efficiency, and style.