Plain Plug Gauge With Depth Measure, Size GO Dia 6.406MM To 6.410MM X Cylindricity-0.002MM. For Depth-Go-47.518MM To 47.530MM & No Go- 48.070MM to 48.100MM,  NOGO Dia 6.590MM To 6.600MM X Cylindricity-0.005MM Gauge No PPGWD6400.6600