CWC 105105 1000-Feet Solid Braid Nylon Cord Rope, 5/16-Inch An extremely strong, soft, light-weight cord with excellent resistance to rot, abrasion, mildew, petroleum products and most chemicals. It has a shock-absorbing elasticity that allows it to withstand great strain. Solid braided construction stays round and works well in pulleys. White nylon is 5/16" in diameter and 1000' long on a spool Minimum breaking force 2,610 lbs.