• Light-weight I-Beam frame
• V-groove bottom for use on rounded surfaces
• Anti-slip and anti-shock end caps protect the frame
• Top read window simplifies readability
| Part No | Size | Inner | Outer |
| 4141 | 600mm | 5 | 30 |
| 4142 | 800mm | 5 | 30 |
| 4143 | 1000mm | 5 | 20 |
| 4144 | 1200mm | 5 | 20 |
| 4145 | 1500mm | 5 | 15 |
| 4146 | 2000mm | 5 | 10 |