Parts list: № Number Qty Name Options 1 RE569372 1 Seat Assembly Next page: ST838219 Passive Seat, Fabric, W/ Tilt and Extend ST837183 Passive Seat, Fabric, W/O Backrest Extension ST901700 Instructional Seat, Fabric (916003 - ) ST838207 Seat Assembly, Passive, Fabric, Low Back, W/ Extension, W/ Cushion Adjustment ST783071 Armrest Substrate Assembly, Passive Seat ST839696 Seat Assembly, ActiveSeat™, Fabric, Low Back W/ Extension, W/ Cushion Adjustment