... multi-leg combination : Advantages:1, light weight, easy to use2, not to hurt the hanging surface3, lifting smooth, safe4, strong, ... checked before every useDacron with inorganic acid resistance function, but vulnerable to damage of the organic acids9, polypropylene places suitable ... organic acids11, nylon when wet strength loss of up to 15%12, if the sling is likely contaminated with chemicals, or ...