Pro Lab Instant Results Carbon Monoxide Test Kit Pack options:Pack of 1 Unlocked by emergency release on

Unlocked by emergency release on exterior or by rotating interior lever

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Metal shots inside head combine to provide maximum controlled striking force without rebound

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Pro Lab Instant Results Carbon Monoxide Test Kit Pack options:Pack of 1 Unlocked by emergency release onCarbon monoxide test kit that is more sensitive than electronic detectors, detecting as little as 50 ppm (parts per million) of the invisible and odorless gas, before it becomes dangerous to you and your family. The kit contains a badge and 2 yellow chemical sensor buttons that turn grey when in contact with carbon monoxide gas. The instant detectors are reusable and, once opened, each button will last up to 3 months (90 days). Blister pack.