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Product name Air pressure reducing valve pressure regulating valve air pressure regulating valve pneumatic air pump pressure precision pressure regulating valve ar2000 sleeveMy dear! Welcome to our shop! The items sold in this store are all original products and the quality is guaranteed! Products in our store will not be returned or exchanged without quality problems after shipment. Please check the features of the item you need before taking a picture, thank you! Because there are a lot of shipments in this store, it takes5-7 days for delivery, please don't order if you can't accept it, thank you for your cooperation! After receiving the product, please give us 5 stars! ! I wish you a happy and happy life every day!