The Spear Pro Dyneema cored reel line has amazing tensile strength for it's size. It is the only line designed specifically for speargun reels with a cylindrical shape and good grip. The construction consists of a soft pliable polyester outer braid of the highest abrasion resistance with inner dyneema core for superior strength. It is ideal for filling speargun reels or of any other water application where safety and long life is absolutely required. Offered in 4 great high visibility combinations. The 1.8 and 2.1mm dyneema has a tensile strength of 410lbs and 550lb respectively.