Weihrauch HW100/HW101 Cylinder O Rings x 2

These are replacement air cylinder O rings for for either end of the air cylinder from the HW100 and HW101, they are not for the little brass part in the breech block, that the air cylinder screws in to. Handy for when you are servicing your rifle. It is also a good idea to keep one in your gun bag in case you develop a leak in the field.

They are black nitrile (rubber) O rings similar to the standard Weihrauch version.

This is for 2 x O rings.

There is a tool available from the eShop that allows you to unscrew the ends of the air cylinder. 

The picture is a generic picture of some O rings, not the actual O rings you are buying.