This air cylinder is specifically for the spear, on both the CURO and the FBW Mk5 denesters which is the lower of the two air cylinders on the denester.
This is not applicable for the knife of the FBW Mk5, that is a separate product: "25x175 Air Cylinder with 30mm Extension" that you can purchase. This is not interchangeable as the cylinder will not extend the required distance otherwise.
