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 VW OE wheels, to ensure your wheels are safely secured. Make sure your wheels are fastened correctly with Polished Ball Seat Wheel Bolts from ECS Tuning. Bolt specifications: Diameter - 12mm Thread Pitch - 1.5mm Length - 40mm *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)