Plain Plug GaugeWith Depth Measure, Size- GO  Dia 19.594MM to 19.597MMXCylindricity-0.001mm, For Depth Go-33.53MM to 33.55MMXNo Go- 34.45MM To 34.50MM & NO GO size Dia 19.714MM to 19.720MMXCylindricity-0.002MM,Gauge No PPGWD19590.19720