This is an inspection hatch to allow efficient work inside the drum of a concrete mixer truck.
- Visual inspection
- Chemical addition port
- Cleaning nozzle insertion port
- Ventilation and lighting hole while removing set concrete
| Opening diameter | Weight | Material | Surface treatment |
| 190mm | Approx. 7kg | Slide plate: SCM435HBQT Seal plate: S25C Spring: SWP Other: SS400 O ring: SiR Cover ring: SUS304 Plug: SUS304 | Electroless nickel plating |
