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.Vehicle Fitment:• Universal Application• Replacement Elements for Radium Fuel FilterInstall Instructions: Download PDFIncludes:(1) Filter Element Which Filter Should I Choose? Filter: Micron Rating: Reusable: Best Use: Compatibility: Notes: Cellulose Paper (18-0025-01) *Discontinued* 10μm Nominal92% Efficiency No Post Pump GasolineDiesel • Excellent Filtration• Most Economical Element• Most Commonly Used Element• No maintenance, but requires replacing Stainless Fine(18-0025-03) 10μm Nominal Yes Pre or Post Pump GasolineDieselE85*EthanolMethanol* • Excellent Filtration• Superior Compatibility with all fuels• Requires occasional cleaning to maintain optimal flow rate Stainless Coarse(18-0025-04) 100μm Nominal Yes Pre Pump GasolineDieselE85*EthanolMethanol* • Excellent prepump filter for any application• Low pressure drop prevents pump cavitation• Superior compatibility with all fuels Microglass(18-0025-05) 6μm Nominal99.9% Efficiency No Post Pump GasolineDieselE85*EthanolMethanol* • Excellent Element for all Applications• Newest advanced technology offering the highest filtration efficiency available on the market• No maintenance, but requires replacing * Alcohols may reduce service life if poor quality fuel or excessive water absorption is present. To prevent, use high-quality fuel mixtures and purge alcohol fuels from the fuel system when the vehicle is stored for long periods. Servicing: Part Number: Element: Inspection: Service Action: 18-0025-01 Cellulose (10 Micron) Gasoline @ 10,000 milesAlcohols/Diesel @ 5,000 miles Replace as needed 18-0025-03 Stainless (10 Micron) Gasoline @ 10,000 milesAlcohols/Diesel @ 5,000 miles Preferred cleaning method: Ultrasonic solvent bathAlternative cleaning method: Carb cleaner followed by light air blast from inside out. 18-0025-04 Stainless (100 Micron) Gasoline @ 15,000 milesAlcohols/Diesel @ 10,000 miles Preferred cleaning method: Ultrasonic solvent bathAlternative cleaning method: Carb cleaner followed by light air blast from inside out. 18-0025-05 Microglass (6 Micron) Gasoline @ 8,000 milesAlcohols/Diesel @ 3,000 miles Replace as needed Flow Data The chart below 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 different flow rates. See more Radium Products