from Beacon, NY United States
Used this product for quite some time now and have never gotten a bad one. Students like these as they are easy to blow thru and single use. They also fit almost any pocket mask out there even the infant sizes.
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2 of 2 people found the following review helpful:
March 31, 2011
Can you really get excited about training valves? I've used hundreds of these without a single problem.
I even had a recert student bring in the same one he used 2 years prior...