Plain Plug Gauge to check ID of the Sleeve (Go Size Min. 4.000 X Max 4.001 X Cylindricity 0.000 X Length Lower 40.000 & Upper 41.000 Std & NOGO Min. 4.011 X Max. 4.012 X Cylindricity 0.000 X Length Lower10/Std & Max 11/Std) Gauge No. PPG 4000.4012 