Smoke Stick Pen Refill - 3 Smoke Sticks

Comes with 3 Smoke-Sticks™ providing up to 3 hours of controllable smoke. Pen NOT included

• First product on the market offering pencil - thin smoke pattern.
• Ideal for testing for the slightest air-movement, gas spillage.
• For mandatory CO spillage checks of boiler/case sills after fitting/re-fitting.
• HVAC air-movement/leakage checks.
• Offers over 3 or 6 hours of smoke (stop/re-start usage).
• Non-corrosive, not harmful.