STANDARD FILL, INCLUDES DUMP CAN
These refueling kits are designed specifically for the Radium Engineering FCST AND FCST-X. The fuel cell surge tanks do not come standard with any of the parts in these kits. As described below, the Radium Engineering refueling kits come in a few different varieties.
NOTE: "Complete" refueling kits include a dump can, as shown in photos below.
20-0815-00 COMPLETE REFUELING KIT, DIRECT MOUNT, STANDARD FILL
This option works for vehicles that require a standard filler mounted directly on the fuel cell. The included fill neck and cap mounts directly to the Radium FCST. A proper vent kit secures directly to the 8AN vent that comes standard with the Radium FCST. 
The provided dump can features a large vent for faster filling than typical fuel jugs.
20-0815-02 COMPLETE REFUELING KIT, REMOTE MOUNT, STANDARD FILL
This option works for vehicles that require a standard filler mounted remotely from the fuel cell. The included flanged filler typically mounts to a body panel. A 1.5" fuel filler hose attaches to the provided Radium FCST mounted fill neck elbow. A proper vent kit secures directly to the 8AN vent that comes standard with the Radium FCST. 
The provided dump can features a large vent for faster filling than typical fuel jugs.
20-0841-00 FCST-X COMPLETE REFUELING KIT, DIRECT MOUNT, STANDARD FILL
This option works for vehicles that require a standard filler mounted directly on the fuel cell. The included fill neck and cap mounts directly to the Radium FCST-X. A proper vent kit secures directly to the 8AN vent that comes standard with the Radium FCST-X. 
The provided dump can features a large vent for faster filling than typical fuel jugs.
20-0841-02 FCST-X COMPLETE REFUELING KIT, REMOTE MOUNT, STANDARD FILL
This option works for vehicles that require a standard filler mounted remotely from the fuel cell. The included flanged filler typically mounts to a body panel. A 1.5" fuel filler hose attaches to the provided Radium FCST-X mounted fill neck elbow. A proper vent kit secures directly to the 8AN vent that comes standard with the Radium FCST-X. 
The provided dump can features a large vent for faster filling than typical fuel jugs.