The Viwinco Cambridge product line is our premier replacement product line and offers enhanced performance and a wide variety of customization, encompassing almost all of our product styles. With the inclusion of high-quality components, more PVC on average than competitor windows, and multi-chambered, fusion welded frames, the Cambridge product line is designed for performance and built to last. Cambridge single- and double-hung windows come standard with Viwinco’s patented Tilt-n-Lock technology—a locking mechanism housed in the meeting rail that allows one-handed operation and some of the industry’s cleanest sight lines.