| Flexnumber | Piston | Piston Type | Top Plate Hole/Stud Qty. | Bottom Plate Hole/Stud Qty. | Top Plate Dia. | Bottom Plate Dia. | Collapsed Height | Type | Remarks |
| 255C-1.5 | 3025 | 3 | 2 | 4.5 | 4.5 | 2.66 | 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 |
| 255C-1.5 | 3025 | 3 | 2 | 4.5 | 4.5 | 2.66 | Double Convolute |