Barrel Bore & Slot Gauge Dia.8.106 to 8.110,Nogo-8.290 to 8.300 mm,Go Length 40 mm,Nogo Length Standard and Go Depth-16.530 to 15.550 & Nogo Depth-17.450 to 17.500 mm (Go-Nogo Guage required to check the CHS Plate Forging B0703F) BBB0703F