The TWA 18 tunnel washing system cleans tunnels and noise protection walls.
| Technical Data | TWA 18 | TWA 21 | |
| Working width | m | 1,80 | 2,10 |
| Bürstendurchmesser | m | 1,0 | 1,0 |
| Drive | Direct drive | Direct drive | |
| Required hydraulic power UNA-MBM | ltr./min bar | 54/200 | 54/200 |
| Required hydraulic power DUA-HDM | ltr./min bar | 68/200 | 68/200 |
| Drive side | Right-left operation | Right-left operation | |
| Use of Tasttronic possible | yes | yes | |
| Weight | kg | 320 | 350 |