315mm SDR21 HDPE Pipe Fish Cage Frame, Floating Fish Cage for Victoria Lake Main pipe 315mm SDR21, strong wind & wave resistance. Integrated and split type brackets optional. Widely used in freshwater lake fish farming. Comapny Introduction: We are the biggest manufacturer of HDPE fish cages in China, cooperate with the East China Sea Fisheries Research Institute, as the Chinese Academy of Sciences anti-wave cage manufacturing industry base.Also as Sun Yat-sen Mariner