1. This versatile micro regulator can be used with soda bottles and 12 / 16g cartridge. 2. Includes a low output pressure gauge and a 8mm barb attachment to attach 8mm ID gas line. 3. The maximum operating pressure of the regulator is 30 psi, and the installation and operation method is simple. 4. With 3/8in to TR21.4 adapter, excellent workmanship, good sealing performance, suitable for Sodastream. 5. Made of high-quality copper material, wear-resistant, with good stability and durability., Manufacturer: Shun Yingtong