Karcher Piston. Genuine Part no 4.553-181.0 from an authorised Karcher dealer. We can find the exact part for you model using the number from the silver data label that is in the format of 1.xxx-xxx.
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Karcher Pressure Washer Piston 45531810 HD 650 645 HDS 551 558 601 4.553-181.0
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