Smoke Pens | McMaster-Carr

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Expose the pen's wick and light it to produce a continuous trail of smoke to detect airflow and leaks in HVAC systems.

Pens					Refill Wicks
Number of Wicks Included	Useful Life	Required Wick Exposure		Each	Pkg. Qty.		Pkg.
6	Up to 60 times per wick	3/8"	000000	000000	6	000000	000000