From open highways to tough job sites, this aluminum cap delivers waterproof protection you can trust. One look through the clear lens shows your oil or grease level so you know you're ready to go further without worry. Complete Waterproof Protection: Keeps water and grit out, so your bearings and hub stay protected. Direct-Fit Replacement: Replaces factory oil bath/grease caps, O-ring, and plug for select axles. Magnetic Fill/Drain Plug: Built-in magnetic plug attracts metal particles, helping prevent wear or damage. Crystal-Clear Viewing Window: Easily check oil or grease level without removing the cap. Easy to Fill or Drain: Maintain lubricant directly through the side port without removing the cap. Anodized Aluminum and E-Coat Resist Corrosion: Stands up to rain, sun, salt, and snow year after year. Fits a Range of Axles, Replaces Existing Oil Caps Replaces the oil bath/grease cap, O-ring, and plug on these axles/brakes: 6K, 7K, or 8K 8-bolt axles Dexter 6K and 8K axles with screw in caps Dexter 9K axles manufactured before 10/1989 Lippert 8K axles Kodiak 8K hub-and-rotor disc brake kit Cap is a direct replacement for these oil caps: Dexter: 21-35 or K71-038-00, or 021-029-00 Lippert: 695814 or 700266 Kodiak: 8001 Application & Dimension: Axle capacity: 6K, 7K, or 8K 8-bolt axles Dexter 6K and 8K axles with screw in caps Dexter 9K axles manufactured before 10/1989 Lippert 8K axles Kodiak 8K hub-and-rotor disc brake kit Thread outer diameter: 2.875″ Warranty 5-Year Warranty Included in Kit: 1 hub cap, 1 gasket, 1 lens, 1 retainer ring, 1 foam gasket, 6 Torx screws, 1 Hydro-Shield vent plug, (1) 1/8 -27 Magnetic Plug, 1 O-Ring