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Details
Machined aluminum cylinder floats in cold water, but sinks in warm water. Includes activity guide.
Measures 0.65" diameter x 3.5" long.
Weight is 0.5 ounces
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm. For more information go to http://www.P65Warnings.ca.gov
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Demonstration Lens Sets, GlassFrom: $13.60
To: $22.20
