This is often know as a Bottom Gland Seal. This is vital to the cylinder as it stops any air intake and the Graphite Seal ensures a smooth pull. This part is precision machined by on site and is only available directly from Angram. This part fits into the bottom or the top depending upon which cylinder this is being fitted to.
-Stops air intake into the cylinder
-Graphite seal ensures a smooth pull
-Precision machined -Fits top or bottom Gland Seal