Introducing the Fire-Lite ST3 Sampling Tube, designed specifically for 2-4' ducts. This durable metal tube ensures reliable performance in your fire alarm system. It comes equipped with the ST3 Mounting Adapter, making installation a breeze. Additionally, the Altronix ST3 Mounting Adapter enhances versatility, allowing for seamless integration into various setups. Perfect for professionals seeking quality and efficiency, this product is a must-have for your safety solutions. Don't miss out on the opportunity to enhance your fire safety system, order the Fire-Lite ST3 Sampling Tube today!