Radium Replacement Fuel Filter Element - Stainless 100 MicronAll replacement elements for the Radium fuel filter use anodized aluminum end caps that are laser engraved for easy identification and use an internal Viton O ring for compatibility with all fuel types. See the element selection guide below. Flow Data The chart belows shows the results of Radium's in house flow testing of these elements in the Radium fuel filter housing. The pressure drop was found by measuring the inlet and outlet pressures at