How to choose the adapter nut thread: CGA320 Diameter=20.8mm Generally applicable to USA, Canada, Brasil, Colombia, Philippines, etc. Colour:Silver + gold + rose red Material:Brass+aluminum+stainless steel Package Contents: 1 x 1.5m PTFE pipe 2 x spacers 1 x rubber ring 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. 1.5 m Co2 adapter Quick Connect Hose is specially designed for the water aerator Duo, Quick Connect QC, Art and No pressure regulator required: Since CO2 becomes liquid under pressure, the pressure in the CO2 bottle is . 50 bar. Therefore, no pressure regulator is required. When selecting the CO2 bottle, the room volume must be taken into account. Quick installation: please check whether the gas bottle is completely emptied before work, and use the quick connector to connect the pressure hose to the adapter. You can choose whether to pass the hose through the hole under the worktop or drill a hole in the back panel of the aerator. This CO2 adapter high pressure hose is made of a strong yet ultra-light Brass, aluminum and stainless steel for a tight seal, environmentally friendly, robust, high , rust-proof and .