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Proctor Needles (Spring Type)

Proctor Needles (Spring Type) (SL-GT-019)
ASTM D 1558
The instrument consists of a needle attached to a spring loaded
plunger, the stem of which is calibrated to read 0 to 40 kg division.
Long stem is graduated at every 12.5mm to read depth of
penetration and for use with needles of larger areas. The small
penetration stem is also graduation in 12.5mm division and is used
with needles of smaller areas. Needle points one each of 0.25, 0.5,
1.0, 1.5, 2.0, 3.5 and 6.0 sq Cm. And one tommy pin is supplied.
Complete as above in a wooden carrying case.

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