Lucas Products and Services manufacture custom triangular duct labels to clearly mark large pipes. These custom duct labels come with self-adhesive backing and easily applied to a clean and dry surface. Some pipe preparation is needed. Our triangular duct pipe labels are resistant to temperatures from approx. -40°C to 82°C. All our duct labels are available in plain coded colours indicating various types of air flow such as hazardous air, conditioned air, cold air, dirty extract air, exhaust air, foul air and clean air amongst others. We can also print legends on our custom triangular duct labels. Industry standard Duct Identification labels sizes are 150mm on all sides.