The Radium Engineering fuel cell fill kits can be used on any cell that uses a 6-bolt 2.18″ (55mm) bolt circle mounting flange. This bolt pattern is used on all Radium Engineering Fuel Cell Surge Tanks. Screw threads are the industry standard 1/4″-28. The 20-0197-V Direct Mount Fill Neck and Cap is perfect for filling directly into the fuel cell. This kit uses the 20-0148-V Fill Neck Cap (included) so filling is quick and simple.
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