【Function】This tool allows you to adapt your Shop Vacuum to allow you to start walnut shell blasting those intake valves on your ride and get it back into shape to be the fine running beast you once had 【Compatibility】Intake port adapter Compatible with VW Audi EA888 engines 【Specifications】The adapter fits a 1 1/4" vacuum hose & up to a 3/8" blast nozzle while doing intake manifold walnut blasting on the intake valves. You may need to use duct tape or additional adapters to fit your particular vacuum. 【Convenience】Manual carbon cleaning is time consuming and near impossible to remove all carbon buildup. Walnut blasting drastically speeds up the process and will leave you with a cleaner valves! 【Service Guarantee】We prioritize your satisfaction. If you encounter any issues or are unsatisfied with our product, we are here to assist you. You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way.