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The Mazzella EN2 polyester endless web sling has heavy-duty two-ply webbing for lifting fragile or irregularly shaped loads with vertical, choker, or basket configurations in construction, general industry, and other low-heat applications. The polyester webbing is soft to avoid scratching fragile or delicate loads. This web sling is flexible, conforms to irregularly shaped loads, and has a better strength-to-weight ratio than a wire rope or chain sling. This polyester web sling resists several chemicals, including alcohols, some acids, bleach agents, hydrocarbons, ketones, oils, detergents, sea water, and weak alkalis. However, it does not resist concentrated sulfuric acid, aldehydes, strong alkalis at elevated temperatures, or ethers. The stretch of a polyester sling at its maximum load capacity is approximately 3%. This endless (also called type 5 or grommet) sling is made of a continuous loop of webbing formed by joining the ends of the webbing with a load-bearing splice, and can be used in vertical, choker, and basket lifting configurations. The load-bearing or wear points of an endless sling can be rotated each time it is used, which can help increase its life when compared to an eye-and-eye web sling. The two-ply construction is stronger and stiffer than that of a one-ply web sling, but not as strong as a four-ply sling, and the sling's heavy-duty webbing is denser than light-duty two-ply webbing. When the sling's red warning yarn becomes visible, this indicates the sling is no longer fit for use. This sling meets American Society of Mechanical Engineers (ASME) specification B30.9 and Occupational Safety and Health Administration (OSHA) specification 1910.184. Slings are used to lift heavy objects for industrial applications. Types of slings include web slings, wire rope slings, chain slings, and mesh slings. The appropriate type of sling for an application depends on the strength-to-weight ratio, flexibility and resistan