Karcher Piston Unit - Single 9.001-927.0. Genuine Karcher piston unit this includes the spring the rod and the cap. Genuine Karcher Pressure Washer K1 K2 Cylinder Head Spare Part 4.551-159.3. Genuine Karcher Pressure Washer K3 K4 Cylinder Head Spare Pump Set 9.002-552.0.
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