Mibro twisted polypropylene rope is a versatile general-purpose utility rope that floats on water and resists rot, mildew, oil, gasoline, and most common chemicals. The UV-stabilized bright yellow construction provides high visibility for safety and easy spotting against grass, deck, snow, and water. The three-strand twisted construction holds knots securely and splices cleanly for eye terminations or end loops.

• Diameter and length: 5/16" x 400 ft
• Safe working load: 135 lb (industry standard 10:1 safety factor)
• Floats on water - ideal for marine, dock, pool, and water rescue use
• Resists rot, mildew, oil, gasoline, and most chemicals
• UV-stabilized polypropylene for extended outdoor exposure
• Three-strand twisted construction - easy to splice, easy to knot
• Lighter per foot than nylon or manila of the same diameter
• Bright yellow for high visibility against grass, deck, snow, and water
• Reel-packaged - pay out and cut to length without tangle

5/16" sits between 1/4" and 3/8" and is the right pick when 1/4" is too light but 3/8" overshoots the working load - light pull lines, light anchor or tie-down work on small boats, livestock tie-out, swing rope, and farm-and-orchard utility.

The 400 ft reel covers contractor, farm, and fleet work where you cut multiple lengths from one reel - tie-downs, lashing, fencing, and field tie-outs.

Tip: Singe freshly cut ends with a lighter or match to fuse the strands and prevent unraveling - twisted polypropylene unravels fast if left raw. For load-bearing knots use a bowline, double sheet bend, or anchor bend - avoid square knots under load. Polypropylene weakens with prolonged direct sunlight (typically 2-3 seasons of continuous UV); inspect before each use for fuzzed strands, broken yarns, or a glazed surface and retire the rope if any of those are present.

Care: Store the reel dry and out of direct sun when not in use. Do not run polypropylene rope on winches or capstans - it melts at low friction temperatures. Avoid loads exceeding the safe working load. Polypropylene shows little warning before failing under shock load, so size up a diameter if there is any chance of jerking or sudden impact.