I’m waiting for a replacement MAP sensor to be delivered which once fitted will hopefully cure my engine management light on problem with fault code dtc 0106

It would make sense to get a new length of vacuum pipe to replace the old pipe when the new sensor is fitted.

Does anyone know for sure the internal diameter of the vacuum pipe? Various sources I’ve found suggest 3.5 or 4.00mm but I’d like to be sure that whatever I buy has a snug fit