Product Dimensions: 2 x 2 x 2 cm; 100 Grams Size: 16mm Quantity: 1 Batteries Required: No Item Weight: 100 g Features: 1. Rotary Adjustment: Two connection methods, horizontal and vertical, allow flexible installation to meet different setup needs without affecting normal operation. 2. Compact and Simple Design: The external CO2 diffuser mounts outside the tank, saving internal space and preserving aquarium aesthetics. Includes a small viewing window for easy monitoring of diffusion performance. 3. Optimized for Strong Water Flow: Smooth, low-resistance surface ensures uninterrupted water flow and maintains the filtration efficiency of the filter system. 4. Integrated Diffusion Technology: Features thin diffusion sheets that produce fine bubbles, increase surface area for better CO2 dissolution, improve efficiency, and reduce gas consumption. Specifications: Material: Aluminum Alloy + Acrylic Inlet Pipe Diameter: 12mm, 16mm Package List: 1 x External Inline CO2 Diffuser Atomizer, 1 x Metal Pipe Clamp Notes: - Due to variations in monitor displays, actual product color may differ slightly from images. Style matches the photos shown. - Please allow 1–2 cm variation due to manual measurement.