These are the little washers that are needed to fit on the end of the hose to the gun to join to the trigger, they do not fit any other part of the hose. 

These are the correct size and hardness  - not the nearest off the shelf metric or imperial ones or a nearly size found in the normal plumbers selection box !

These will stop the pressure washer hunting and keep topping up the hose when not being used. They are a perfect seal, easy to connect / disconnect and let the pipe rotate easily which helps to avoid kinking.

You will receive five new O Rings.