52-234-522-0 Fowler Deep Throat Point Micrometer 0.3" - 1.7"
547-320S 6.9" Deep Throat Thickness Gage 0-.4"
547-520S Mitutoyo 4.7" Deep Throat Thickness Gage 0.47" Range
547-520S-CAL Mitutoyo 4.7" Deep Throat Thickness Gage 0.47" Range with CAL Cert