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U.S.
Sieve:.................................. 30
Mesh Nominal Size
Roundness:............................... The
glass beads have a minimum of
75% true
spheres when tested visualy
Specific
Gravity:........................ Nominally
2.50g/cc
Hardness:.................................. 5
to 6
Compessive
Strenght:............
20,000 psi minimum
Free
Silica:..................................
0% |