Features: Transform your sodas making experience with the CO2 Cylinders adapter, designed to convert TR21-4 interfaces to W21.8, ensuring compatibility with various sodas bottles and accessories for multifuntionl use. Crafted from stainless steel, this adapter boasts corrosion resistance and pressure endurances, providing a reliable and long lasting solution for homebrew enthusiasts and aquarium CO2 regulation. Suitable for enthusiasts, home users who enjoy crafting their own carbonated beverages, and office workers seeking convenient access to sodas water, enhancing their lifestyle with ease. Perfect for diverses setting such as home kitchens, office break rooms, outdoor activities like camping and picnics, and even in restaurants or bars looking to offer freshs sodas drinks to patrons. With its modern styles, this small and portable adapter seamlessly integrates into any kitchen or beverage setuping, adding both functionality and aesthetic appeal while ensuring gas pressure regulation. Specifications: Texture: Stainless Steel Size: Approx. 1.06x1.38inch(2.7x3.5cm) 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.