Product Description FM/UL Approved Fire Fighting Parts Two Grooved End CouplingProduct Description Feature: ductile iron grooved coupling 1) Material:ductile iron ASTM  2) Reducing installation costsThis kind of coupling is designed for the pipe bearing moderate pressure. It allows controlled angle, linear and rotational movement at each joint and provides the added advantages of expansion, contraction … Continue reading China Standard Large Bore PU Layflat Hose Coupling Ldhc V with Teeth