... resistant 2)light weight,high intensity.,long service life 3)low installation and mainence costs mateiral and technics: fiber glass colth,resin ... ,quartz sand, continous fiber glass widing with skill manufacturefeatures: 1)corrossive resistant 2)light weight,high intensity.,long service life ... 3) stiffness class SN1250SN2500SN5000SN10000 4) length:6m,12m [FRP PIPES fiber glass colth,resin]