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|   | Pilot | Summary | 
| None   Comfort Seat Back Support options can only be selected with Comfort Seat Back Support. | no | 
Comfort back supports are WC-20 certified.
| TPSB4 | Acta-Back   Requires 12" (30.5 cm) (Seat Width) or greater. Requires Aluminum Canes for Aftermarket Back Support, No Pad (Seat Back Type). | $760 acta-back-cc | 
| TPSB5 | Acta-Embrace   Requires 10" (25.4 cm) (Seat Width) or greater. Requires Aluminum Canes for Aftermarket Back Support, No Pad (Seat Back Type). | $840 acta-embrace-cc |