Density Set Brass, Set of 12 brass cylindrical bars of different length but the same diameter. Students learn that the density of a substance is constanteven as its mass and volume change. Comes in an attractive wooden holder
Durably Constructed to Withstand Wear and Tear Resulting from Repetitive use,Waterproof Housing Protects the meter in their Working Environment,Simple Operation in a Slim and Portable Design,measurement of pH, oxidation-reduction potential(ORP), conductivity, salinity