Spool Type (FP-32): This format provides the stopper material wound continuously around a pocket-sized spool. It allows the user to pull out and snip custom lengths depending on how many turns they prefer for their knot (e.g., standard 4-to-6-turn knots)
| Size | Compatible Gō Rating (号) | Millimeter (mm) Diameter Range | Ideal Typical Mainline Strength (Mono) |
| Small | #1.0 – #63.0 | 0.165 mm – 0.285 mm | 4 lb – 12 lb |
| Large | #3.0 – #6.0 | 0.285 mm – 0.405 mm | 12 lb – 25 lb |
