Throw away your match book. Here's the professional way to check for drafts at ducts, doors and windows; air leaks in boilers, drains, and pipes. Not to mention checking for down drafts, blockages or cracks in chimneys and flues - which can lead to carbon monoxide poisoning. Creates non-toxic, clean, white smoke.

Features:

• 30 seconds burn time
• 20 matches per box
• 30 cubic feet of smoke

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