These seals are used around the piston of all pneumatic and computerised A+ and Minigraf machines. They will become damaged over time and can cause air leaks and a loss of power to the firing. The damage is usually due to a lack of an oil going through the machine via the oiler unit.
These are often replaced or manually lubricated by our engineers during routine servicing of these machines.
Please note: The pack of seals will contain a couple of seals that are not needed, this is due to the use of a few different types.