Quick Summary
The RainierSupplyCo Boat Fender Lines are a 4 pack of black boating ropes for docking and mooring. Each line is 6′ x 3/8″ and has a 5″ spliced loop, which makes attachment to cleats, fenders or pilings straightforward.
The ropes are described as double braided nylon lines with heat-treated, professionally whipped ends. They are presented as boat fender lines and dock lines for use around pontoons, fishing boats and PWCs.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | RainierSupplyCo |
| Product type | Boat fender lines / dock lines |
| Pack quantity | 4 lines in the pack |
| Length | 6′ per line, which helps when checking the spacing you need at the dock |
| Diameter | 3/8" per line |
| Loop | 5" spliced loop for attachment |
| Colour | Black |
| Material | Double braided nylon |
| End finish | Heat-treated and professionally whipped at both ends |
What to Compare Before Buying
- Pack quantity: This pack contains 4 lines, so check that the quantity matches how many docking points or replacement lines you need.
- Length: Each line is 6′, so compare that with the dock clearance and the amount of slack you want.
- Diameter: The stated 3/8" size is a useful check when comparing line thickness with your setup.
- Attachment method: The 5" loop is the key fitting detail, so make sure that loop style works with your cleats, fenders or pilings.
Compatibility, Size and Fit
These lines are described as suitable for pontoons, fishing boats and PWCs. The important checks are the 6′ length, 3/8" diameter and 5" loop, since those are the details that determine whether the set matches your docking arrangement.
If you need a different loop size, a longer line or a different pack quantity, it is worth comparing the exact variant before choosing.
Before You Decide
Confirm the 4 pack quantity, 6′ length and 5" loop size before choosing a line set. The black double braided nylon finish is part of the product identity, so it is worth checking that those details match your dock setup and replacement need.








