155mm High Ring required in most units. It fills the final gap between the Rigid Lengths and the Ceiling Parts. A warehouse kit does not use this component.
| HEIGHT | THROAT SIZE (Dia.) | CODE |
| 155mm (6") | 343mm (13.5") | 343-AP-R98-LR |
| 155mm (6") | 457mm (18") | 457-AP-R98-LR |
| 155mm (6") | 535mm (21") | 535-AP-R98-LR |
