Features: Experience seamlesses CO2 refilling with our TR21 4 to CGA320 adapter, designed for efficient and secure connections between various CO2 cylinders and devices like sodas machines. Crafted from brass, this adapter is corrosion resistant and pressure resistant, ensuring durability and reliability for long term use. Suitable for home users making carbonated drinks, commercial beverage suppliers such as cafes and bars, and outdoor camping enthusiasts using gas powered equipment. Perfect for connecting TR21-4 interfaces sodas machines to CGA320 CO2 cylinders, suitable for home carbonation, commercial beverage systems, and DIY projects requiring gas supply. The small and portable designs allows for easy storage and transport, making it essential accessory for both household and outdoor activities. Specifications: Texture: Brass Height: Approx. 1.57inch(4cm) Package Includes: 1 Set Adapter note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.