The Flair 58 Stem Guider replacement attaches to the lever hook of the Flair 58 and Flair 58x.
The Stem Guider was designed to help maintain proper alignment of the lever hook and the plunger as they descend into the brewing cylinder during extractions.
Visit the Stem Guider Instructions page, linked here > for more information.
For instructions on how to install the Stem Guider, see this video here >