Having Spare when you are on a Spear Fishing Safari can make the difference between a great day of hunting and one that you wish you could forget. Always have spare items in your Save-a-Dive Kit to protect yourself against mishaps. This Special High Resistance Spear Gun Line is Specifically-Designed for Spear-Fishing. Mares Diamond Lines are made of 100% Dyneema with Woven HT Polyester Covering. Dyneema is an Ultra High Molecular Weight Polyethylene Fiber that is 15-Times Stronger than Steel Wire, Lightweight at 7-Times Lighter than Steel Wire and Floats in Water. Dyneema Line is Water Resistant Hydrophobic and will not Absorb Water, meaning it will remain Light when working underwater. This Line is also Chemical-and-UV Resistant. The Line is available in 1/16" (1.5mm) Diameter with a 328' (100 meter) Length and a Tensile Strength of 400lbs (180kg) or 5/64" (2.0mm) Diameter 164' (50 meter) Length and a Tensile Strength of 660lbs (300kg). Line is covered by a 24 month limited warranty.