Designed with the rigors of big- game fishing in mind, so it will hold up to the longest of battles and the toughest of bills and teeth. It is a great choice for rigging big marlin lures as well as big-game circle hooks onto heavy leaders for slow trolling live baits like small tuna, bonito and skipjack. The tubing is solid black, so it doesn't shine, sparkle or stand out like some other tubings. It is made out of the highest quality plastic available.