David Wujcik
Tube wall thickness is 1.6mm, might be too thin for some fittings.
Bought this ST13 10/13 to replace the EK DuraClear 10/13 I had in my case. It was only after I cut and installed the ST13 that I realized my 13mm locking hose clamps and 10/13 water cooling fittings didn't firmly clamp this hose. The main difference I could measure is that the wall thickness of this ST13 hose is thinner than the DuraClear. The wall thickness of the DuraClear is ~1.9mm and the ST13 is ~1.6mm. So when installed on a fitting the DuraClear is ~13.58mm thick and the ST13 is 13.13. The EZClik hose clamps I use are 13.2, so they slipped right off. A quick fix is to put a layer of heat-shrink around every piece of hose end, or to sleeve them, but that's a lot of work. It's still a good product, but I wouldn't recommend it if you have a bunch of 10/13 EK fittings, a different brand of fitting might work, or maybe you can find a thicker-walled 10/13 EPDM hose.