Good sealing performance, no air leakage when connected with the cylinder, more convenient to use.<br>Mainly used for the thread adapter of the machine cylinder, and can also be used as the air source switch.<br>Made of high-quality materials, high hardness, and wear-, long service life.<br>The thread is tight, superb technology, stable performance, and the installation and use is simple<br>If you want to use a steam TR21-4 bottle instead of a Quooker Cube bottle, you can use this adapter.<br><br>Threads: Tr21-4 female to Tr12-3 male.<br>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<br>Colour:Photo Color<br>Material:copper<br><br>Package Contents:<br>1 x CO2 Gas Converter<br><br>Only the above package content, other products are not included.<br>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.