The Smoke Pellets by Rothenberger are designed for flue and chimney testing. Each pack contains 6 x 13gm smoke pellets, making them ideal for checking the efficiency and safety of your chimney. These high-quality pellets ensure a consistent and controlled smoke output, allowing you to test your chimney system with confidence. Perfect for DIY enthusiasts or professionals in the fireplace and stove industry, these smoke pellets are a must-have for maintaining and improving the performance of your chimney.