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gmat · 09-11-2002, 03:53 AM

That's because of wall thickness. Metal barbs usually have a 1.5mm or 2mm wall hence a 12mm OD barb will have a 8mm or 9mm ID. Nylon barbs may have 1mm walls, i'm not sure...

09-11-2002, 03:53 AM	#13
gmat Thermophile Join Date: Mar 2001 Location: France Posts: 1,221	That's because of wall thickness. Metal barbs usually have a 1.5mm or 2mm wall hence a 12mm OD barb will have a 8mm or 9mm ID. Nylon barbs may have 1mm walls, i'm not sure...