External diameter of the inverter coolant pipes

Hi!

Does anyone know the diameter, of the inverter coolant pump pipes? I’m parked up at the auto store, so can’t measure it, half an hour so far - it is very well guarded info online (unless you know where to look; I don’t)!

thank you if anyone knows!

 

Thank you! Now I just need to sort the battery (all the blocks that should be 14.4v are 15.30 (one of them), 12v (2 of them); 8,6 and most are 2.5 volts. Except for two which are 1.25 volts. I left it sitting a year due to covid - I didn’t realise this would happen!!