new and high quality.High Wear-resistant and excellent durability. SUITABLE FOR USE IN AQUARIUMS: The carbon dioxide pressure reducing valve is very suitable for your breeding of aquatic and tropical fish. Supplementing aquatic plants with sufficient carbon dioxide can increase their growth rate and greatly improve the ornamental plant population. If your primary role is fish farming, rather than aquatic plants, use this regulator with caution. TAKE IT EVERYWHERE: Keep putting pressure on your barrel when you're not home without clunky CO2 gear. Lightweight construction for easy setup of your mobile device; Portable size allows you to take it with you to any outdoor barbecue or get-together. ADAPTER NOT REQUIRED: The premium regulated charger is very compact, but just big enough to accommodate a very small regulator. Do not use an adapter. LONG LIFE: Mini CO2 regulator system with aluminum components for stability and longevity. EASY TO USE: Insert the CO2 cartridge, turn the rotary knob to the desired PSI and attach it to your keg. The included isolating switch ensures a tight seal every time. The 0-90 PSI gauge on the regulator is accurate and accepts CO2 cartridges of various sizes. Not recommended for use with nitrogen. Please note that a 5 gallon keg requires multiple cartridges to fully dispense. Height: 75.4mm Thread: TR21-4 Gauge pressure: 90Psi Weight: 224g Colour: silver Material: aluminum + copper Package Contents: 1 * Pressure regulator connector Only the above package content, other products are not included. Note: Light 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.