ECS Tuning's ball seat wheel bolts adhere to some of the most stringent testing and safety standards, and also feature a corrosion resistant coating for longevity. The ball seat of the bolt was specifically designed for compatibility with Audi & VW OE wheels, to ensure your wheels are safely secured. Make sure your wheels are fastened correctly with Ball Seat Wheel Bolts from ECS Tuning. Bolt specifications: Diameter - 14mm Thread Pitch - 1.5mm Length - 50mm *When installing wheel spacers, add the size of the spacer to the length of the OE wheel bolt for proper fitment (ex. 27mm Length OE Wheel Bolt + 15mm Wheel Spacer = Requires a 42mm Length Bolt)