Genuine Part no 2.882-574.0 from an authorised Karcher dealer
Your part may also be stamped with 6.686-290 / 6686290
Please click on Karcher / Pressure Washer Part category in our shop for many other Karcher parts
For select Karcher models including some:
HDS 551C
HDS 558C
HDS 601C
HDS 501C
If you are unsure if this is the correct part for your machine please feel free to ask as each model of Karcher can take different parts that look similar