10 Pack Aquarium Control Valves Plastic Fish Tank Air Line Control Regulator Valve

Feature: 1. This air valve has an adjustable button that can help adjust the gas volume of the air pump. 2. Great to be used for regulating the oxygen volume either increase or slow the air down into air stone. 3. Made of high quality plastic, environmentally friendly and healthy, durable, long service life. 4. The adjustable button inner hole diameter is about 3mm/ 0.1in, so these air valves can be easily connected to aquaculture pipelines. 5. Insert the air control valve directly into hose. Please screw down tightly to prevent leaking when turning off. Specification: Item Type: Aquarium Control Valves Material: Plastic Inner Hole Diameter: 3mm/ 0.1in Colour: Black. Package List: 10 x Aquarium Control Valve