The Arctic Hayes Smoke-SticksKit is the first product on the market offering a pencil thin smoke pattern. The smoke is non-corrosive and not harmful. Ideal for testing for the slightest air-movement, gas spillage. Also for mandatory CO spillage checks of boiler/case sills after fitting/re-fitting and HVAC air-movement/leakage checks. The Smoke-SticksKit comes with 3 Smoke-Sticksproviding up to 3 hours of controllable smoke. Refill pack also available.The Arctic Hayes Smoke-SticksKit comes with: 1 x Smoke-Pen3 x Smoke-SticksAdditional Information:Tester Type: Smoke-SticksColour: White