Outside Air – Triangle Duct Marker Identify HVAC ductwork with these Triangle Duct Markers. These markers both label and show direction using ANSI approved colors for pipe marking. Labels can be customized per request, contact us today! Made from industrial indoor/outdoor vinyl and adhesive that is designed to last outdoors for 5 years. Made from Industrial Indoor/Outdoor Vinyl Resistant to Water, Chemicals, UV exposure Resistant to Smearing and Smudging Durable: Designed to last 5-7 Years Outdoors Min. Application Temp: 40 Service Temp: -40 to 180 Send me information about Outside Air – Triangle Duct Marker Get more information about this product and one of our sales representatives will be in touch with you shortly! Close Just one more step… Product Reviews Helpful Resources