The 'SP-445' is a compact 4x5 sheet film processing system from 'Stearman Press LLC'.
The tank can develop 4 sheets at a time and after development and fixation, the films can be washed inside the SP-445 tank.
To accompanion this tank development system, I decided to make a DIY force film washer. The washer allow me to conveniently transfer the SP-445 sheet film holders directly from the dev tank and into the film washer. Assuming you have spare film holders, the dev tank can then be given a quick rinse in order to be ready for developing a next batch of films (while the first batch is still in the film washing tank).