Feature 1 Versatile Application: The trailer axle kit is suitable for cargo boat trailer spindle. Please confirm whether it is consistent with the product you want before buying to avoid unnecessary return. 2 Stable Performance: Cargo boat trailer spindle axle kit ensures the trailer stay stable and eliminates sway while driving. It maintains a secure connection between the trailer and towing vehicle. 3 Enhanced Safety: The trailer can withstand high load pressure, able to support the weight of the trailer stably and provide users with a safe and reliable towing experience. 4 Sturdy and Reliable: Crafted from premium metal materials, this trailer hub spindle ensures durability and reliability to provide long term use and durability. 5 Optimal Functionality: The trailer axle hub kit is designed with a 4 on 4in idler hub and 1in round BT8 spindle for easy installation and enhanced performance.Item Type: Trailer Axle KitMaterial: MetalHub Screw: 4 StudWheel Hub Screw Diagonal Length: Approx. 4in / 10.1cmSpindle Diameter: Approx. 1in / 2.5cmFitment: Suitable for Cargo Boat Trailer Spindle Package List1 x Trailer Axle Kit (16Pcs)