... free size 2.quality :first grade 3.Price :Competitive and reasonable 4.Material :Polyurethane,filling ptfe, etc Specifications 1. ... corrosion resistance,3.even in the enviroment of high temperature and acid, alkali or strong oxidizing agent not reaction4. ... has been widely used as sealing material, applied to the pipe, flange, reactor, valves and container sealing device. Main advantage 1.excellent ...