Keystone Compac Smooth Stone expands the versatility of the Compac system with the addition of a two-sided face. Each face is 18″ wide with three-sided chamfering, delivering a crisp, modern finish. Utilizing the trusted Keystone pin connection system, Keystone Compac Smooth Stone is ideal for gravity walls up to 3.75 feet tall and expansive projects exceeding 60 feet. Complement your design with corner and coping units to complete the look.