Please note: There may be slight color difference or discrepancy in the actual product, which does not affect the use, please don't mind, thank you! Food Grade Materials Support High pressure - The working pressure of the hose is 5000psi. The aluminum construction has excellent performance in terms of resistance, 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.