Brand new design, dull polish of the , and an integral forming process, more reliable and beautiful.Use For Terra, DUO or ART Quick Connect Machines which suit your Tr21-4 machine connection.Also as a Terra DUO or ART machine to external tank Conneect Adapter.Attention! This item is does not fit for Australia and New Zealand bottles.Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Usematerial: metalColor as shownPackage Contents:1 x CO2 Quick ConnectorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.