Double Braid Fender Lines - Miami Cordage


Our custom made fender lines are made from our premium nylon double braid rope, they are ideal to use for attaching your fenders and are typically burned clean and whipped at both ends. A spliced eye on both or both ends is also available. The nylon double braid rope is manufactured by Miami Cordage as well and available in all colors as well as customized double braid rope. An additional great feature is to customize the whipping on your fender lines to quickly identify different lengths or diameters.


  • Predictable & controlled elongation, excels in strength & abrasion resistance
  • Standard lengths of 10′, 15′, 20′, 25′ & 30′
  • Custom lengths & spliced eyes available on request
Part # Nominal Diameter Circ
Inch MM
FL38 3/8 10 1-1/8 4,100
FL716 7/16 11 1-1/4 5,500
FL12 1/2 13 1-1/2 7,300
FL58 5/8 16 2 14,600

Compliance to the above specifications is based upon testing according to the Cordage Institute Standard Testing Methods for Fiber Rope and/or ASTM D-4268 Standard Methods of Testing Fiber Ropes.

Weights: are average and may vary +/- 5%.

Tensile strengths: are approximate average for new, unused ropes. To estimate the minimum tensile strength of a new rope, reduce the approximate average by 15% (Cordage Institute defines minimum tensile strength as two standard deviations below the average tensile strength of the rope).

Nylon rope has three characteristics that make it ideal for dockline. Nylon rope is incredibly strong, it is very stretchy, and it resists the harmful effects of sunlight better than any of those fancy-name synthetics.

Nylon ropes value of strength is self-evident, but the benefits of elasticity may not be as obvious. When your boat surges against an unyielding dockline, the load on the line goes from zero to the maximum at the instant the nylon line comes taut. The likely consequence is a broken line-not unlike how you might snap a piece of thread with a jerk. Even if the nylon rope is strong enough not to break, it is hammering cleats and bitts with every surge. Nylon rope doesn’t come taut suddenly, but dissipates the load by stretching. It is like the difference between hitting the steering wheel or hitting the air bag.

As for nylon rope’s resistance to ultraviolet damage, docklines, particularly permanent docklines, live in the sun. Nylon lines enjoy a much longer life than other lines in that environment.

Nylon Fender Line Colors