| Flexnumber | Piston | Piston Type | Top Plate Hole/Stud Qty. | Bottom Plate Hole/Stud Qty. | Top Plate Dia. | Bottom Plate Dia. | Collapsed Height | Type | Remarks |
| 20F | 3100 | 3 | 2 | 6.31 | 6.31 | 4.1 | Double Convolute |
| Flexnumber | Piston | Piston Type | Top Plate Hole/Stud Qty. | Bottom Plate Hole/Stud Qty. | Top Plate Dia. | Bottom Plate Dia. | Collapsed Height | Type | Remarks |
| 20F | 3100 | 3 | 2 | 6.31 | 6.31 | 4.1 | Double Convolute |