I have an unknown type silent type Air compressor supposed to be an Iwata but no ID anywhere on it looks like an Silent 50-6 model but has a sealed refer type compressor , the question I have is that the air line from the compressor to the air tank seems to be a metric size and crimped on the the air outlet pipe so I can not just remove it to see the size of inner ID, Also the air outlet pipe seems to be a smaller diameter then the oil or air intake pipes, there are numbers on the hose looks like 8/8 or 8/6 they are scraped a bit and old also there another bit of print MB perhaps or M8 , So back to the question does anyone familiar with metric airline/tubing size's know if that is a metric size for tubing
TIA