Specifications Conditions: Type: Control Piston Material: Brass + 304 stainless steel Replacement OEM:4.553 268.0 Compatible For For Karcher K 7.20 MX 720MX For Karcher K 7.20MX, K 720MX, K 7.21MX Package Included: 1x 2x Control Valve Piston Kit Fearture: *The control piston is an additional protection against overpressure. It opens the internal water circuits and reduces the outlet pressure. *Symptoms of damage are reduced operating pressure, intermittent operation with the gun switched on, or complete lack of pressure with the pump running. *The product is a REPLACEMENT of the original Krcher valve with the number 4.553.268.0 Is compatible with models: For Krcher K 7.20MX, K 720MX, K 7.21MX