Alloy mesh bag, also named sack gabion,snake-dragon craft, hexagonal mesh bag. Sack Gabions are double twist hexagonal wire mesh units consisting of a single mesh panel laced to form a cylindrical unit. Sack Gabions are filled with rock at the project site to form flexible, permeable, monolithic structures used for emergency and river training works, besides, it can used for decoration. Alloy mesh bag’s characteristics: self water permeability: there are gaps between stone fill in the alloy mesh bag,The stone fill is good for the water to seep through the structure, relieving the hydrostatic pressures,insure the earth’s shear strength,well for whole structure’s stable;meanwhile,saved the charge for traditional retaining drainage equipment,low down the whole cost. Long life: the material of alloy mesh bag is 10% aluminum-zinc alloy steel wire, excellent manufacture technology decided zinc cover’s uniformity, better corrosion resistance,using life can reach 100 years(details please refer to the technology documents). Economy: alloy mesh bag defend project is formed by steel mesh box and fills. its cost lower than concrete price, lower and near to cemented masonry price. it can save foundation treatment’s great expense,especially the repair protecting project in the bad soil and base, presented greatly its advantage of low price. Easy to installation: Alloy mesh bag can make into semi-manufactured goods according to design, and then the installation and set based on drawing,easy to operate,small effection by the climate, and fit for mechanized operation,it not only assure the project quality but also can quicken the pace of the project. Applied Scope: underwater fling project, slope fencing project. where local conditions require fast installation or the water does not allow easy access to the site (underwater installations). How to use: Sack gabions filled with stones are used in river control and various emergency works. Sack gabions are supplied with steel reinforcing wires inserted during the manufacturing process to facilitate closing during installation. Treatment: Wire for making of sack gabion is electro galvanized. Dimensions and sizes of galvanized sack gabions can be customized. length (m) Diameter of mesh bag(m) volume (m3) 1.8 0.6 0.54 2.7 0.6 0.80 1.8 0.9 1.2 2.7 0.9 1.80.