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|   | TWIST | Summary | 
| Stock | ||
| Model | ||
| Abduction Frame | 
| Stock | ||
| Transit Option | 
| Stock | ||
| Camber | ||
| Camber Tube | 
| TWSB1 | Folding, Adjustable Height Aluminum   | alumfoldingadj | 
| TWSB3 | Aluminum   | alum | 

| None   | no | |
| TWSB11 | Seat Back that Locks when Folded   | yes |