... 63mm,75mm,90mm,110mmStandard: according to GB/T18742.3 and DIN8077/8078Color: white,gray,green,blue etc.Quantity: ... prolonged stresses combined with pressure and temperature.2.Long service life, testified non-toxic and sanitary3.Good resistance to kinds ... traditional pipes5.Recyclable, benefit to the environment 6.Simple and reliable connection, such as socket fusion, flange connection, ...