Plain Plug Gauge, Size - Go - 9.503mm to 9.505mm, Nogo - 9.595mm to 9.600mm & Depth Go - 2.650mm to 2.695mm, Nogo - 2.945mm to 2.955 mm  Go - Nogo Gauge (Required to check the Barrel plate  Counter Bore), Code - PPG9.5/2.6