Seachoice Twisted Braid Polypropylene Spool, Yellow, Floats. X 600 Ft., 100% Polypropylene

600 Feet of Floating Polypropylene Line. Ready for Whatever the Water Throws at It.

The Seachoice 3/8" x 600 Ft. Twisted Braid Polypropylene Spool is a workhorse line for boaters, dock operators, and anyone who needs reliable, versatile rope in bulk. Made from 100% polypropylene, this line floats — a critical advantage on the water where a dropped line needs to be recoverable, not sinking to the bottom. It’s stronger than manila, resistant to rot, acids, and oils, and can be stored wet without degrading the fibers.

At 3/8" diameter and 600 feet per spool, this is the go-to bulk line for dock lines, anchor lines, ski tow lines, utility rigging, and general marine applications where you need a lot of line at a practical price.

Key Features

• Floats — 100% polypropylene construction keeps the line on the surface if dropped overboard — easy to grab and recover
• Stronger Than Manila — Monofilament fiber construction delivers superior tensile strength vs. traditional natural fiber rope
• Rot, Acid & Oil Resistant — Holds up in harsh marine environments without degrading
• Stores Wet — No damage to fibers from wet storage — coil it and stow it without drying first
• Easy to Splice — Twisted braid construction makes splicing straightforward for custom terminations and loops
• Versatile Application — Suitable for dock lines, anchor lines, ski tow lines, utility rigging, and general marine use
• High-Visibility Yellow — Easy to spot on the water and on deck
• Bulk Spool — 600 feet per spool for cutting to length as needed

Specifications

• Brand: Seachoice
• Material: 100% Polypropylene (Monofilament Fiber)
• Construction: Twisted Braid
• Diameter: 3/8" (9.5mm)
• Length: 600 ft (182.9m)
• Color: Yellow
• Floats: Yes
• Weight: 8.62 kg (19.0 lb)
• Part Number: 50-42720

Whether you’re stocking a marina, outfitting a work boat, or just need a reliable bulk line supply for the season, the Seachoice polypropylene spool delivers the length, strength, and float you need at a price that makes sense.

⚓ Parts Desk Insight

• Polypropylene floats — nylon does not: Customers choosing between polypropylene and nylon dock lines should know that polypropylene floats while nylon sinks. For tow lines and ski ropes where floating is critical, polypropylene is the right choice. For dock lines where stretch and shock absorption matter more, nylon is often preferred.
• Bulk spool — cut to length: This is a 600-foot spool, not pre-cut dock lines. Customers will need to cut and finish their own lengths. Whipping, heat-sealing, or splicing the cut ends is recommended to prevent unraveling.
• UV resistance varies: While polypropylene resists rot, acids, and oils well, it can degrade with prolonged UV exposure over multiple seasons. For permanent outdoor installations, inspect the line annually and replace if it shows brittleness or color fading.
• 3/8" is a common utility diameter: Suitable for most light-to-medium dock line, anchor line, and utility applications on smaller vessels. For larger boats or high-load applications, step up to 1/2" or larger diameter line.