Compatible Model: Co2 Quick Adapter only replacement for Crystal 3.0/Duo/Terra/Art/E-Duo/ soda maker,can connect Co2 refill adapter Accessories,Co2 Cylinder with TR21-4 Male Thread. Easy to Install: The Co2 Quick adapter with split design, it is very convenient to install. It can be installed without removing the machine base. Comes with 3 replaceable rubber rings. Used to replace aging, dirty, damaged rubber rings. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind! Colour:-Red Material:aluminum Package Contents: 1 * CO2 Quick Adapter 3 * replaceable rubber rings 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. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!