Sufix 661-104 Monofilament Line
- Mono Line
- 4 lb
- 1
- Nylon
A clear 4 lb monofilament spool built for light-tackle, finesse fishing rather than heavier freshwater or saltwater use.
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How it ranks among the 47 mono lines we track
4.6★ across 181 Amazon ratings, Bayesian-smoothed toward the category average.
181 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 47 mono lines we track - how the scorecard works · full mono lines data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
Sufix built the 661-104 as a light spool, 4 pound test monofilament running 330 yards in clear, weighing about 2.08 ounces on the spool.
At 4 lb test this spool sits toward the light end of monofilament lines, suited to finesse panfish or trout presentations rather than anything requiring heavier drag pressure. The clear color is meant to stay unobtrusive in open water, and the 330 yard length gives enough line for several refills on light spinning reels.
- 4 lb test monofilament
- 330 yard spool length
- Clear color
- About 2.08 ounces per spool
Who it's for
Anglers targeting panfish, trout, or other light-tackle species where a thin, clear 4 lb line matters more than raw strength. Not suited to anglers needing heavier pound test for larger fish or thicker cover.
Strengths and trade-offs
Drawn from this product's published specifications.
- 4 lb test suited to finesse light-tackle fishing
- Clear color for low visibility
- 330 yard spool for multiple refills
- Too light for larger fish or heavy cover
- Mono stretches more than braid or fluorocarbon
Performance notes
Monofilament stretches under load, which helps absorb a hookset on light line and reduces the chance of pulling a hook free from a lightly hooked fish. As a single extruded strand rather than braided fibers, it also handles knots predictably, which matters more on light 4 lb line where knot strength has less margin.
Specifications
| Brand | Sufix |
|---|---|
| Model | 661-104 |
| Dimensions & fit | |
| Line Weight | 4 lb |
| Item Weight | 2.1 ounces |
| Length | 330 yards |
| Construction & materials | |
| Material | Nylon |
| Color | Clear |
| Included components | |
| Pieces | 1 |
| Other details | |
| Technique | Monofilament |
| Special | 330 yards fishing line |
Other Sufix mono lines
How it compares
This product against the closest alternatives we track in mono lines.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Sufix 661-104 Monofilament LineThis product | 4.6 / 5 | 181 | 3.7 / 5 |
| Clear AFL-05 Monofilament LineClear | 4.8 / 5 | 11,454 | 4.7 / 5 |
| Berkley BGQS20C-15 Monofilament LineBerkley | 4.7 / 5 | 23,102 | 4.5 / 5 |
| Zebco 300225 Monofilament LineZebco | 4.6 / 5 | 4,933 | 4.4 / 5 |
| Trout 87665 Monofilament LineTrout | 4.6 / 5 | 2,992 | 4.3 / 5 |
Similar mono lines from other brands
Questions about the Sufix 661-104
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What pound test is the Sufix 661-104?
4 pounds.
How long is the spool?
330 yards.
What color is the line?
Clear.