... 3) anti aging,heat resisting,cold resistance 4)offer OEM or ODM The polyurethane seal ring is made from 100% polyurethane ... tremendous resistance to temperature extremes,temperatures as high as 200 or as low as -50, do not destroy its physical and ... ,corrosion resistant,temperature resistant 200,high tensile strenth,cold resistance,non toxic,etc6.Dimension:Can produce out-diameter up to 800mm7 ...