For optimized CO2 refilling, this adapter uses an innovative design. Prior to inflation, place the cylinder in the freezer for 24 hours. During inflation, position the cylinder at a 45-degree angle and follow the provided instructions for efficient CO2 charging. This method helps improve inflation performance and maximizes cylinder usage. This model is compatible with large CO2 tanks and works with Terra, Art, Duo, E-Terra, and E-Duo systems. Use this adapter to connect your CO2 system to a larger storage tank for faster refilling of CO2 cylinders. The CO2 cylinder adapter includes a pressure gauge for easy monitoring. This feature allows for clear pressure readings, supporting safe and effective refilling. Designed for use with 60L CO2 cylinders, the adapter enables refilling smaller tanks from larger ones. Constructed from high-quality metal materials, the adapter has been polished and electroplated for enhanced corrosion resistance. To ensure a secure seal, three additional O-ring rubber rings are included for easy replacement, helping prevent leaks. Type: W21.8-14 Material: Metal Color: As shown Package Contents: 1 x CO2 Quick Refilling Adapter 3 x O-ring rubber rings Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.