1.Cert:ABS,CCS,DNV,LRS etc 2.Material:stainless steel,aluminum,alloy steel 3.Sizes:6kg-6600kg,Boat Anchor 4.nude packing ... Anchor1.cert:ABS , CCS , DNV,LRS etc.2.Material:stainless steel,aluminum,alloy steel3.Sizes:6kg-6600kg4.nude packing.5.Design ... u need,kindly please contact us,thank you. 4 ton Marine stainless steel Flipper Delta Anchor