If you operate any type of hoist or crane you will know that a brief daily inspection of equipment is simply just safe practise and should never be disregarded. One day it is likely that your daily check will reveal excessive wear on the hoists wire rope or load chain, this requires action sooner rather than later and that action is to replace the rope or chain.
Many believe that you can simply order the same diameter rope and length expecting it to work or the same gauge chain expecting it to run. If only life were so simple! These cheeky hoist manufacturers want your business and they want it again and again! So they specially manufacture chains and ropes for their hoists and sometimes place rights upon that design. Playing carefully the manufacturers never release enough information to manufacture the rope and there for forcing the customer and middle man to buy from the manufacturer the official rope or chain.
This of course has its ups and downs- the manufacturers tend to take advantage to the fact that they are the only place you can get replacements which means sky high prices for end users, however should something ever go wrong you will usually have the backing of the manufacturers warranty which is not effected with the use of genuine parts. Be safe not sorry, always use genuine replacements, if somebody tries to offer you different- you have been warned!