Features: Professional CO2 generator system with stainless steel bottle, better than simple plastic bottle generators. It is more reliable, steady, durable and efficient. Safety valve will open automatically when the pressure over the safe pressure. Any problem, please contact our store without hesitation. Honor to serve you Specification: Name: CO2 generator system Main material: Stainless steel Main color: Silver 3 size optional: 1L: Height: 29.5cm; diameter: 8.6cm; thickness: 0.12cm; 2L: Height: 47cm; diameter: 10cm; thickness: 0.12cm; 2L double: 47cm; diameter: 10cm; thickness: 0.15cm; material ratio: 1L: Citric acid 100g+baking soda 100+water 150g 2L: Citric acid 200g+baking soda 200+water 300g 2L double: Citric acid 400g+baking soda 400+water 600g Note: Invert the bottle and disassembly are prohibited. Package Information: Package size: 15 * 15 * 44cm Package weight: 1L: 1340g; 2L: 1840g; 2L double: 2429g Gift Box Packaging Package List: 1* Stainless steel bottle 1* Pressure reducing valve 1* Bubble counter with check valve 1* Pressure gauge 1* Built-in safety valve 1* Fine adjusting valve 1* ABS multiple filter 1* 1.5m tube 2* Suction cup 1* Manual