Feature:1. HEAVY DUTY STRUCTURE: The 8 inch RV jack wheel is made from iron, rubber material, providing maximum density and strength. It features a special waterproofing compound for excellent service in wet and cold conditions.2. LONG DURABILITY: The swivel caster protect against degradation, damage, and oxidation from oils, greases, acids, and solvents commonly used in RV maintenance.3. ENHANCED PERFORMANCE: With a 16mm center bore, 193mm rim length, and 54mm rim width, this RV Jack Wheel has a capacity of 1500lbs (about 680kg) and is suitable for trailers.4. SIMPLE INSTALLATION: The trailer jack wheel is designed for easy installation and is compatible with most RV jacks. It provides smooth and stable operations for trailer maneuvering.5. VERSATILE APPLICATION: The jack wheel is designed for simple and convenient installation on jack stands, enhancing the mobility and stability of your trailer RV.Specification:Item Type: Heavy Duty Trailer Jack WheelMaterial: Iron, rubberDiameter: Approx. 193mm / 7.6in Wheel Rim Width: Approx. 54mm / 2.13in Hole Diameter: Approx. 16mm / 0.63in Capacity: Approx. 1500lbs / 680kg Fitment: for Trailer RV.Package List:1 x Trailer Jack Wheel