Heavy Duty Galvanized Steel Keel Roller Assembly for Boat Trailer with Mounting Hardware 1. Good Stability: Our stationary keel roller ensures maximum boat protection with its high friction and stable design. The 4-inch diameter black rubber spool effectively reduces wear and tear to 's underside. 2. Erosion Resistance: This stationary keel roller boasts a hot-dip galvanized coating, offering excellent erosion resistance for prolonged usage in any outdoor setting without rusting. 3. Smoother Appearance: Elevate your boating experience with our stationary keel roller, crafted for long-lasting durability and outdoor use. Enjoy a smooth and sleek appearance for your vessel. 4. Easy to Install: For boat trailer tongues or frames, the bracket can be bolted to a 2inch trailer tongue frame, ensuring a secure fit and smooth use for your stationary keel roller. 5. Extensive Suitability: The bracket's 3-inch spaced holes offer optimal flexibility and stability during installation, allowing for an effortless mounting experience on any trailer. The stationary keel roller bracket is a must-have for any boat owner. Reduce wear and tear on the bottom of your boat. Item type: keel roller bracket Applicable type: for 2-inch 3-inch trailer tongue bracket Color:As Shown Material:rubber Package Contents: 1 * Stationary keel roller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.