Aquarium System CO2 Regulator Needle Check Valve Bubble Counter Fish Tank Accessory 02# This tool is made of high grade stainless steel material, which is anti-corrosion, abrasion resistant, glossy and durable. stainless steel needle micro-metering valve with high precision, easy to release CO2 by fine tuning. Special metal-grinded surface, light weight, easy to operate. Features: 1. Made of high grade stainless steel material, which is anti-corrosion, abrasion resistant, glossy and durable. 2. Ergonomically design, easy to install and convenient to remove. 3. stainless steel needle micro-metering valve with high precision, easy to release CO2 by fine tuning. 4. Special metal-grinded surface, light weight, easy to operate. 5. Different styles to choose, meeting your different demands. Specification: Item Type: Aquarium System Accessory  Material: Stainless Steel Item Color: As Pictures Shown Package Weight: Approx. 47-83 g / 1.6-2.9 oz Package Include: 1 * Aquarium System Accessory