This is the start stop valve for some Nilfisk water blasters.
Nilfisk Start Stop Valve 128501513
Old part number 128500626 and 128500850
Suits:
Nilfisk E140.3
Nilfisk E140.3-9XTRA
Nilfisk D130.4
Nilfisk D140.4
Nilfisk E130.3
Nilfisk E145.3
Nilfisk E145.4
Nilfisk E150.2
Nilfisk E160.1