1.CONSTAB PEX material 2.Oxygen barrier 3.Factory price 4.AENOR,WATERMARK, ... on using the best CONSTAB PEX material in the world2.With WATERMARK,AENOR,EME,ISO certificate verify,EVOH PEX pipe is widely used for ... ,chemical resistance,environmental friendly,ultraviolet rays resistance5.EVOH PEX pipe is made from three layers,with pex inside,oxygen barrier outside,and glue in ...