A. New design, dull polish, and an integral forming process, more reliable and beautiful. B. Use for Terra, DUO or ART Quick Connect Machines which suit your Tr21-4 soda machine connection. C. Also as a Terra DUO or ART machine to external tank Connect Adapter. D. Attention! This item does not fit for Australia and New Zealand soda bottles. E. 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 use. F. Material: metal G. Color as shown H. Package Contents: 1 x CO2 Quick Connector I. Only the above package content, other products are not included. J. 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.