New design, dull polish, and integral forming process for enhanced reliability and appearance. Compatible with Terra, DUO, or ART Quick Connect machines with TR21-4 soda machine connection. Can also be used as a Terra DUO or ART machine to external tank connector adapter. Attention: This item is not compatible with Australia and New Zealand soda bottles. Note: Product may vary slightly between batches, including minor differences in color or design, which do not affect functionality. Material: Metal Color: As shown in image Package Contents: 1 x CO2 Quick Connector Only the above items are included; other items are not part of the package. Note: Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error allowance: +/- 1-3 cm.