About D Engine Selling: D engines have more than 20 grams, so unlike A,B,C engines, you will need a credit card to take off your gunpowder. Orders cannot be shipped out if you do not have permit. In order to purchase (assignment) and use (consumption) the D engines must be permitted by the prefecture governor (some regions may be the chief of the municipal municipal). (Article 17 and 25 of the Pollution Registration) After receiving a firearmpesticide consumption permit, send it to the seller, fill in the name, quantity, sales date (date of delivery) and we will return it with the product. When applying for permission, Category: Gunpowder, Product Name: Injector for Model Rocket Medicine Volume: 1.0 oz (29.0 g) per bottle (3.0 oz (87.0 g) per bottle - Sold in 3 units. Classification: Firearm Product Name: Ignition Tool; Medicinal Quantity: 0.02 oz (0.02 g) per bottle (0.06 g / 3 bottles - for the ignitor).