| Indiv. Dims | Base Dims | |||||||||||
| Description | L | W | H | Wt | L | W | H | Aluminum | Black | |||
| Low Profile LoSider Side Rail 56in Box, Pro Series | 56 | 19 | 11.75 | 52 | 56 | 13.5 | 7 | 80-RB178-9 | 80-RB178-9-B | |||
| Low Profile LoSider Sid Rail 47in Box, Pro Series | 47 | 19 | 11.75 | 45 | 47 | 13.5 | 7 | 80-RB180-1 | 80-RB180-1-B | |||