... 50mm,63mm,75mm,90mm,110mmStandard: according to GB/T18742.3 and DIN8077/8078Color: white,gray,green,blue etc.Quantity: LargeDelivery ... prolonged stresses combined with pressure and temperature.2.Long service life, testified non-toxic and sanitary3.Good resistance to kinds ... , such as socket fusion, flange connection, screw joint and other method If anything you are interested in, pls feel free ...