... % Nylon with a breaking strength of 69 lbs. Item:Premier Braided Nylon Masonry Construction Mason's Layout Line Material:100% NylonSize: #18 ... abrasion, rot, mildew, marine growth, petroleum, and chemicals. Breaking Load: 69 pounds. 1.5mm Diameter and 250 feet long We are ... ropes.This type of Premier Braided Nylon Masonry Construction Mason's Layout Line , is ideal for staking out construction sites ...