The 1000' Foot Spool of Black Parachute Cord has a 7-Strand Core of 550 Cord. This product is an authentic cord that is provided by Paracord Planet. The diameter of this cord is 5/32” or roughly 4mm. With its many uses, it has a tension strength of 550 pounds, doesn't rot or fade to UV sunlight. The uses of Paracord are endless; a few examples would be for camping, fishing, hunting, hiking, biking, survival, safety, military, crafting, and general purpose. Bracelets, lanyards, key chains, pet collars, leashes, hammocks, baskets, monkey fists, handle wraps and zipper pulls are all items that can be created using Paracord. Other items include tents, clotheslines, marking trails, bundling items (firewood), fishing stringer, emergency fish line, stitching, building fires, bow drill, rock sling (for protection & hunting), boot lace replacement, securing items and decorations.