Seachoice 42770 Red/White Solid Braid MFP Multi-Purpose Spool (Derby Rope), 3/8" x 500'

Derby Rope. Floats. High-Visibility Red and White. 500 Feet Ready to Fish.

The Seachoice 3/8" x 500 Ft. Red/White Solid Braid MFP Derby Rope Spool is the go-to bulk line for fishing derbies, tournament setups, and any application where a buoyant, high-visibility floating line is needed in quantity. The red and white colorway is the traditional derby rope standard — easy to spot on the water, easy to identify at the dock, and purpose-built for the demands of competitive and recreational fishing events.

Made from 100% monofilament polypropylene (MFP), this line floats, resists rot, mildew, and marine growth, and holds up in the wet, high-use conditions of a busy fishing derby. Solid braid construction keeps the line round and firm, feeding cleanly through hardware and maintaining its profile under load.

Key Features

• Derby Rope — Traditional red and white colorway used in fishing derbies and tournament setups; easy to identify and manage on the water
• 100% MFP (Monofilament Polypropylene) — Floats on the surface; easy to grab and recover if dropped overboard
• Solid Braid Construction — Maintains a firm, uniformly round profile under load; feeds cleanly through blocks and hardware
• Rot, Mildew & Marine Growth Resistant — Polypropylene does not absorb water; holds up in continuous wet-use conditions
• High-Visibility Red and White — Easy to spot on the water; reduces tangles and confusion in multi-line derby setups
• Multi-Purpose — Also suitable for tow lines, safety lines, utility rigging, and general marine applications beyond derby use
• 500-Foot Bulk Spool — Cut to any length needed; enough for a full derby setup or multiple utility lines

Specifications

• Brand: Seachoice
• Construction: Solid Braid
• Material: 100% MFP (Monofilament Polypropylene)
• Diameter: 3/8" (9.5mm)
• Length: 500 ft (152.4m)
• Color: Red and White
• Weight: 6.35 kg (14.0 lb)
• Part Number: 50-42770

Whether you’re running a fishing derby, setting up a tournament course, or just need a high-visibility floating line in bulk, the Seachoice red/white MFP derby rope spool is the right tool for the job.

⚓ Parts Desk Insight

• Red/white is the derby rope standard: The red and white colorway is widely recognized as the traditional fishing derby rope color. It’s used to mark boundaries, lanes, and zones in fishing tournaments and derbies. Customers organizing events will typically ask for this specific color combination.
• Floats — critical for derby and boundary line applications: A floating line stays visible on the surface and doesn’t create underwater hazards for propellers or fishing gear. MFP’s buoyancy is the primary reason it’s the standard material for derby rope, not nylon or polyester.
• Same construction as the blue/white MFP spool — different color: The red/white and blue/white 3/8" x 500’ MFP spools are the same material and construction. Color is the differentiator. Red/white is the derby standard; blue/white is more commonly used for general utility and tow line applications.
• UV degradation applies to all polypropylene: Like all polypropylene rope, this line can become brittle with prolonged UV exposure over multiple seasons. Inspect annually and replace if stiffness or brittleness is observed. Store out of direct sunlight when not in use to extend service life.