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HMA-120 Mechanical Soil Compactor Calibration Kit for use with HM-530 and HM-531 Mechanical Soil Compactors. Use of Calibration Kit ensures compliance with ASTM D2168 Method B. Kit contains lead deformation apparatus, micrometer, and fifty lead calibration cylinders. HMA-121 Mechanical Compactor Calibration Cylinders are available as replacements.
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