These are designed for testing a chimney or flue for any spillages. They create a dense smoke to highlight any potential issues. They are sold in various colours and can be either matches or cartridges.
Tub of 50
Smoke Colour: Grey
Burn time Grading: 9
Technical specification
Waist Sizeac31ch8gwTypeSmoke PelletManufacturer Model No333009BBrand NameArctic Hayes