3M 26109, PPS Series 2.0 Adapter, Type S23, 1/4 Female, 18 Thread NPS, 7100135941 
Insize 7351-1EX11, LONG HANDLE, length 18.7″, 6928640357251
$195.82
Applicable bore gages 1.4 – 2.4″, 2 – 6″
To assist deep-hole measurement.
Can be used for bore gages 2323, 2123, 2824 and 2827.
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