Description: 【Steel Material】: Made from high strength steel, this 4 piece set of boat trailer bunk brackets offers durability and stability, ensuring your boat remains firmly supported during transportation 【Fitment】: The 8 inch Top Bunk Brackets kit fit for 3 x 3 inch, 2 x 3 inch, and 1.5 x 3 inch boat trailer crossbeams 【About Installation】: Boat Trailer Guide with Hardware. Square U bolts allow easy attachment to the boat and trailer. The installation mounting the bracket on beams before or after the axle or on C channel beams with galvanized U bolts wrapped around it. washers and nuts secure the bracket in place 【Feature】: Slotted holes on the bunk bracket can be used for height adjustment. Repair Parts, equipped with a top that can be easily adjusted to accommodate different hull shapes and angles, ensuring optimal support and alignment for your boat 【Versatile Compatibility】: This Replace kit is suitable for a wide range of boat trailers and inflatable boats, catering to the diverse requirements of different users Size Chart: Package size 22.8cmx22.2cmx8.1cm/8.98inchx8.74inchx3.19inch Package Includes: 1 Boat Trailer Bunk Brackets Kit Note: Please allow slightly errors 1-2cm differences due to manual measurement.