... , bright,strongh resistance,physical inertia, etc. Ink Tube (PU air hose) Technique parameter:Density: g / am cubic (2.10-2.30 ... .5mmLength: 50/100m Characters:1. Use genuine PU material, the hose is smooth, bright, and has standard inside and outside ... hose diameter, uniform thickness2. It has resistance to oil, high temperature, ...