... to 5mm, 3-5ply( Of course,we can make silicone hose according to customers' requirements)4,Color:Black / red / blue / purple ... hose are welcome (with your logo on it) 6,Usage: for charge coolant and water, on intercooler, radiator, turbocharger and supercharger ... pressure than original rubber hose does and the silicone tube can bear the high low temperature, non-toxic tasteless, insulation, anti-ozone ...