Feature:1. Application: Trailer arm anti collision block is used for towing caravans or motorhomes, (only for towing balls with 22mm thick wire rod).2. Practical Accessory: Trailer arm anti collision block can prevent you from accidentally hitting the trailer arm. It is a safe and reliable accessory.3. Premium Material: Made of premium rubber material, this block is flexible, wearproof, high temperature resistant, not easy to break.4. Simple Operation: Trailer arm rubber block is simple to operate, no cutting or splicing, no complicated operations, convenient for using.5. Long Use Life: Professional manufacturing, high performance, strong reliability, can be used for a long time, do not need to change frequently.Specification:Item Type: Trailer Arm Anti Collision BlockMaterial: RubberHole Diameter: Approx. 22.7mm/0.89inApplication: For towing caravans (only for towing balls with 22mm thick wire rod).Package List:1 xTrailer Arm Anti Collision BlockNote:The diameter of the center hole is 22.7mm, so it is only applicable to the trailer ball with 22mm thick rod