Fuel Filter Element (18-0025-04) by Radium. Material: Stainless. Mesh Size: 100 Micron. All 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. Want to improve fuel delivery to squeeze extra power out of your engine? Choose from top-quality Radium performance fuel system parts. Designed using the latest computer simulation and modeling techniques, they will exceed your expectations in every way. Highly resistant to wear and tear, these parts will handle the toughest conditions offering long-lasting service.