This is a special order item and will ship separately.
Please allow 6 - 10 business days (typically, and if available from our supplier) for the item to be processed prior to shipping.
"11 MM.FERRULE WITH 3.4 MM.HOLE", used with the 1/4" nipples to accept the longer pressure gauge fitting. It's really just a loose pipe end cap.
La Marzocco part #: L137/3.