Matt, Ergonomic gaming computer chair PC gaming chair custom computer chair red 2D Headrest The middle board is 2

The middle board is 2 sides fabric covered MDF board

1) Height adjustable armrest

1) Ergonomic stackable training chair

2) Mesh back + black PP with fiber back frame + fixed lumbar support

1) Modern design training chair 2) SEAT&BACK: white PP with fiber+Fabric padded seat with high density foam

Matt, Ergonomic gaming computer chair PC gaming chair custom computer chair red 2D Headrest The middle board is 21) High back swivel PU gaming chair2) PU back and seat with high density foam inside, headrest with pillow foam side3) Height adjustable armrest with soft PU armpad4) 2. 5mm thickness butterfly mechanism with tilt & lock function, back reclining max. 155 degree and any angle locking5) BIFMA passed CLASS 3 gaslift6) 350mm nylon with fiber base +BIFMA passed PU nylon 60mm castorsRemarks: Height adj. armrest & 2D armrest, price is same; if change height