These are made to a very high standard, They are plain Black in colour, With no logo's on pipes. 

Full 4.5 mm Thickness

3-Ply Nylon for Strong Reinforcement 

Working pressure 85 PSI / Burst pressure 245 PSI

Withstands Operating Temperatures from -65F to 500F Degrees Fahrenheit 

Made of High Quality Silicone For High Temperature