01. aluminium box
          02. adapter rings
          03. ball bearing
          04. Orifice cap
          05. steel shaft
          06. inlet funnel
          07. belt
          08. guide rail
          09. belt winder
          10. suspension spring
          11. stop stopper
          12. end rail
          13. aluminium or PVC slats
          14. Locking device
          15. inspection flap
          16. guide rail
          17. inlet funnel
          18. roller cap
          19. ball bearing
          20. Steel shaft / motor
          21. Orifice cap