The standard CGA320 external hose can be used to connect large CO2 storage tanks to maker machines, For DUO/TERRA/ART/Crystal3.0/ Carbonators series. Food Grade Materials Support High Pressure - The hose has a working pressure of 5000psi. Both the hose and o-rings are made of food-grade materials, ensuring safety and reliability. They not affect the taste of the carbonated water and provide excellent air tightness. Save on Refill Costs - This CO2 tank adapter hose kit is incredibly easy to install and remove. It allows you to connect your maker machine to an external Non-Siphon CO2 canister with a CGA320 outlet valve. By directly connecting a large CO2 tank to your maker machine, you can instantly save on refill costs. It is suitable for CGA-320 outlets Wide Applications - The machine extended adapter can connect to large CO2 tanks, Light Weight, Easy Install- The length of adaptor is 1.5M, Compare to other heavy ,it is easier to assemble on water machine and bottle. Colour:As Shown Material:Plastic + Metal Package Contents: 1 x Terra Machine Co2 Adapter Quick Connector Adapter Kit Only 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.