Strength synthetic fiber lifting sling crown size, type of selection 
 When lifting with the specifications, must be lifting the load size, weight, shape, and ready to adopt the methods of lifting the combined effect of factors included in the calculation used to consider, dzd limit given work force requirements, while working environment, the type of load must be considered. Must select both capable, but also to meet the appropriate use of the length of the sling, if more than one sling is used simultaneously lifting the load, dzd must use the same type of sling; flat sling the raw materials can not be affected by the environment or load . Whether soft lug attachment or whether it needs to be carefully considered with the last paragraph of lifting accessories and lifting equipment and accessories to match.