| Size specification | |||||
| Fold diameter(W) | Model number | Stretch range(mm) | Package(L) | ||
| Inches | mm | Minimum.(I) | Max.(0) | ||
| 1/8" | 3 | FR-003 | 1 | 6 | 1000m/Volume |
| 1/4" | 6 | FR-006 | 3 | 9 | 500m/Volume |
| 5/16" | 8 | FR-008 | 5 | 16 | 350m/Volume |
| 3/8" | 10 | FR-010 | 7 | 19 | 350m/Volume |
| 1/2" | 12 | FR-012 | 8 | 24 | 300m/Volume |
| 5/8" | 15 | FR-016 | 10 | 27 | 250m/Volume |
| 3/4" | 20 | FR-019 | 14 | 30 | 200m/Volume |
| 1" | 25 | FR-025 | 18 | 35 | 200m/Volume |
| 11/4" | 30 | FR-032 | 20 | 50 | 150m/Volume |
| 11/2" | 40 | FR-038 | 30 | 60 | 100m/Volume |
| 13/4" | 45 | FR-045 | 35 | 75 | 100m/Volume |
| 2" | 50 | FR-050 | 40 | 80 | 100m/Volume |
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