【Connectors T】 The T connectors can divide your breathing circuit to operate a second pneumatic stone from the same pump. You can also combine two entries for creating a more powerful output to use with multiple output pumps. 【High quality】 The air flow control valve is made in a quality, durable and easy-to-use plastic material.A small piece of non-toxic plastic that allows you to connect two circuits d air or more. 【Turn gas volume adjustment】 Simply rotate 90 degrees from the fully closed position at the fully open position. The airflow control valve of L ‘aquarium is convenient for adjusting the gas volume of the air pump. 【Valve control handle】 With the valve control handle, it is convenient to regulate the airflow of the bottom At the top. 【Practical tool to keep fish】 This control valve The airflow of the aquarium is a good product to keep fish. Specification: Item Type: Air flow control valve Material: plastic Color: blue Quantity: 10pcs Size: ENV.3.9 x 1.7 cm / 1.5 x 0.7 inch