The AP-C Duct Smoke Detector Sampling Tube is designed for reliable smoke detection in HVAC systems. Made from durable steel, it features air intake holes drilled along the entire length of the tube for efficient air sampling. Compatible with ducts ranging from 6" to 2.5' in width, this tube ensures accurate and consistent detection, helping maintain safety and air quality in commercial and industrial applications. Perfect for use with duct smoke detection systems, it offers a robust and effective solution for fire prevention.