Description: 【Quick Inflation】: This Sodastreaming bottle quick inflation adapter with Tr21-4 thread is designed for inflating from large CO2 bottles to 0.6L small bottles, making it a convenient tool for your beverage needs. 【Material】: Made of durability aluminum alloy, this adapter is built to last and withstand heavy use, ensuring you get the most out of your purchase. 【Perfectly Fit】: With an outlet 8mm quick connect and inlet Tr21-4 thread, this adapter ensures a secure and tight connection for efficient gas transfer. 【Versatile Use】: Most commonly seen on Sodastreaming fill adapters/stations, this product can be used in various settings where quick and efficient gas transfer is needed. 【Package Includes】: Each purchase comes with a Sodastreaming bottle quick inflation adapter, providing great value for your money. Size Chart: outlet:8mm/0.31inch quick connect inlet Tr21-4 thread Package Includes: 1 set Sodawater Cylinder Refilling Adapter Note: Please allow slightly errors 1-2cm differences due to manual measurement.