<https://www.hipressureparts.com/product/cylinder-connector-128452/#product>
<http://schema.org/description>
"300 bar, for CFK cylinders with nozzle for slow filling. Limits the fill rate to approx. 30 bar/min when filling breathing air cylinders to reduce cylinder heating.\r\n\r\nOrder number   128452"
<https://www.hipressureparts.com/product/cylinder-connector-128452/>