The DONN SDX SDXL Ceiling Suspension System is the most widely used acoustical suspension system because it offers maximum economy simplicity and accessibility. It s hot-dipped galvanized steel construction provides corrosion-resistance and ensures paint adhesion. Working together with USG ceiling panels they form the fastest-installing ceiling systems in the industry. Both the commercial remodeler and the DIY will find ceiling installation easy with the patented QUICK-RELEASE cross tee clip. The clips are easy-to-remove without tools minimizing tee damage. An audible click when securing tee-to-tee connections ensures accuracy. The tight USG main tee splice yields sturdy square ceilings. Flange width 15 16 In. Color White.