"Plain Ring Gauge Go-7.998 to 8.000, Cylindricity- 0.001, Nogo -7.950 to 7.953 mm, Cylindricity- 0.001, Length standard. ( Go-Nogo Gauge Required to check the Rasp Cum Trial,  Legend Cementless Hip Stem Rasp C0212.1300 ) PRG8000.7950