Sold by the foot. The Spear Pro Dyneema cored reel line is 1.8mm thick with an amazing tensile strength at 410 lb. 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 great tensile strength. It is ideal for filling speargun reels or for any other water application where safety and long life is absolutely necessary.