1. No adapter required: You can use it without an adapter. 2. Made of aluminum and plastic: This carbon dioxide charger is made of aluminum and plastic, which means its quality and durability are improved. 3. Easy to install: There is an 8 - millimeter rod at the disconnecting position. Connect it to your keg and adjust the dosing pressure through the carbon dioxide pipeline. 4. European standard: It complies with European soda - maker standards and is suitable for carbonated water bottles with T 21 * 4 threads. 5. High - quality adjustable charger: It is very compact but just large enough to accommodate a very small regulator. Product Do not use an adapter. It is made of aluminum and tough plastic, with excellent quality and durability. There is an 8 - millimeter rod at the disconnecting position. Connect it to your keg and adjust the dosing pressure through the carbon dioxide pipeline. It is suitable for European - standard soda - makers and is used for carbonated water bottles with T 21 * 4 threads. The high - quality adjustable charger is very compact but just large enough to accommodate a very small regulator. Specifications: - Condition: 100% brand new - Material: Aluminum, plastic - Color: As shown in the picture - Dimensions: Approximately 8 * 6.1 cm / 3.2 * 2.4 inches - Thread: T21 * 4 Packing list: 1 gas regulator