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TEST STONE 1-7/8 X 1-1/2 X 1/4

TEST STONE 1-7/8 X 1-1/2 X 1/4
Item# 56710
$18.85

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A dark stone on which needle and item to be tested are rubbed. Use with test acid solutions. Stone measures 1-7/8" x 1-1/2" x 1/4" (48 x 38 x 6 mm).