Marine Panama Chock 1.Material:cast iron 2.Strict quality controling 3.supply certificate Strict quality controling instruction: 1.Material:cast iron 2.Strict quality controling 3.supply certificate Specifications: Panama Chocks GB 11586-89TypeNorminal SizeInstallationAC310,360,400,450,500Deck MountedBC310,360,400,450,500Bulwark Mounted Marine Panama Chock