Tell you what, pm me your address and I'll send you a 3 meter one
we use the 1/2" hose, outside diameter, and we have 3/8 NPT female connection on either end
Because then I can fit male, female, valve or whatever directly on the hose,
The shorter hoses, 1 or 3 meter I have 10mm Ermeto on either end, female swivel nut on one end and male 10L on the other end, because then I can connect it to the plant with the Danfoss SNV 10mm we use and then I can splice it on to my other hoses using male to female if I need.
But the shorter 3 or 1 meter hoses are between the vacuum pump and the plant, so that is svivel 10mm ermeto on either end
I have a coil of 10mm Pneumatic pipe I can use as vacuum pump discharge, but most of the jobs are smaller and while it's not ideal, I leave the vacuum pump up on deck to vacuum through the 10-30 meter of hose, as I can leave it there to work while I take all the other tools back to the car and other wise clean up around the job.