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The HM-104 Density Plate used with HM-100 Sand Cone Density Apparatus. The 12x12in (305x305mm) aluminum alloy plate has 1/2in (12.7mm) high edge walls and 6-1/2in (165mm) center hole as a guide for the test hole. Flange of sand cone fits plate opening for filling with special HM-106 Density Sand.
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