1.DN15~80mm 2.Flange Standard: GB, DIN, JIS, ANSI; 3.Material: NR, NBR, EPDM 4.manufacture,reasonable price. Features and Benefits of our threaded metal rubber connectors • Absorb Pipe Movement/Stress, • Reduce System Noise,• Isolate Mechanical Vibration, • Compensate Alignment/Offset, • Eliminate Electrolysis,• Protect Against Start-Up Surge ForcesFeatures and Benefits of Songxia Products:1. ...