Pebax is a Nylon-based Engineering Plastic Tube.  It's made from Pebax(Nylon-based thermoplastic elastomer) which is a Polyether-Block-Amide Copolymer.  The specific gravity of Pebax is low (approx. 80%, compared with urethane elastomers).  Many hardness types are available ranging from 75 Shore A to 72 Shore D.  It has remarkable mechanical, physical and chemical properties.  Pebax can be widely used for many applications.  The environmentally-friendly grade which is made from castor oil can be selected.