Usage Tips:CGA-320 Machine Hose - 60inch CO2 Hose Adapter fit with for DUO, for E-Duo, for ART, for TERRA, for E-Terra, for Crystal 3.0 and for Gaia (any maker for QC cylinders), NOT fit with "Blue CO2 Cylinder Connection Systems" (e.g. for Fizzi One Touch, for JET, for Aqua Fizz, for Genesis, for Source, for DrinkMate, for Aarke, for Philips) Material - Made of plastic and metal, hose and o-rings are food-grade materials. Odorless, anti-corrosion, and not easy to deform. It doesn't affect the taste of the carbonated water Easy to Operation - It is easy to install and remove. It allows you to connect your maker machine to an external Non-Siphon CO2 canister with a CGA-320 outlet valve. (It is only applicable to gas CO2 tanks, NOT to liquid CO2 tanks.) Lightweight - The adapter hose is 60 inches long and weighs about 0.7 pounds. Its working pressure is 5000 psi. By directly connecting a large CO2 tank to your sparkling water maker machine, you can instantly save on refill costs Wide Application - Suitable for non-siphon CO2 tanks with standard CGA-320 outlet valves. Colour:As Shown Material:Metal Package Contents: 1 * Machine Co2 Adapter Quick Connector Adapter Hose 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.