Hi Shee, there is two rings in this set, as photographed above. However the set for the K300B has five in, and can be found here: http://www.espares.co.uk/part/pressure-washers/karcher/p/1315/877/0/0/537802/o-ring-seal---pack-of-5.html
by
Rory
- 20 July 2009