Heavy-Duty Shock Mount Kit - Fits 3" Axle TubeOur heavy duty, bolt on shock mount kits will help give you a more comfortable travel experience by managing your axle spring movement. This kit provides a smoother ride and is available in multiple sizes to fit your towing needs. This complete bolt on mounting kit is for 2 3 8" or 3" axle tubes and features heavy duty gas shocks. Heavy duty shock mount kit Available sizes: 2. 375" or 3" Bolt on shock kit absorbs road shock to provide a more