... standard is 1/4", 1/2", 1/8", 3/16" and so on. Color: as you demand, generally such as:nature ... - tight bend radii;Excellent operating temperature range;Hydrocarbon resistance; oil and grease resistance; solvent resistance; hydrolysis resistance; high compression resistance ... is doable. Product Use:Industry robot, pneumatic tool, assembly plant, and the duct with pressure; vehicles service, brake system ...