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Extra Filter Paper for Calibration (Whatman #3)

Replacement filter strips for calibrating your SC-1 Porometer head.

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California requires the following notice

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

Extra Filter Paper for Calibration (Whatman #3)