Grove valve stem identified by the cap label as manufacturer part number 27406007. That label lists a 1 in stem diameter and 21.962 in length.
Packaging labels conflict: the cap identifies 6 in Class 600 G4, while the outer tube identifies 6 in Class 150/300 G3. Compatibility beyond the exact part number is unconfirmed. Match the part number and dimensions before purchase; do not rely on the tube's valve-series or pressure-class label alone.
The source record reports refurbishment and no installation after refurbishment. Independent functional testing is not documented. Supplied as photographed. Protective shipping dimensions and packed weight are estimates.