Radium Complete Refueling Kit, Direct Mount, Standard FillThese complete refueling kits are designed specifically for the Radium Engineering FCST. The FCST does not come standard with any of the parts in these kits. As described below, the Radium Engineering complete refueling kits come in 4 different varieties. 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