Sufficient quantity: The package ns 30 black fish tank air pump control valves, which are sufficient to meet your daily needs and replacementTwo-way control valve: There are two-way control valve for aquarium air pump, no need to find the direction, easy to install, just plug directly into the 4mm trachea.Durable material: The fish tank T-shaped control valve is made of high-quality plastic, which is light, durable, and durable. The water is safe and reliable, so you can use it with confidenceWide range of applications: The fish tank air pump valve can be used in household fish tanks, landscape scene aquariums, restaurant ornamental fish tanks or other drip irrigation systems; it can be rotated to control the air or water flow, and the switching is simple and convenientSize information: The length of the fish tank air hose valve is approximately. 38 mm / 1.5 inches, suitable for connectors with a diameter of 4 mm / 0.16 inchesMaterial:plasticcolour:BlackPackage Contents:30 x Air pump control valveOnly 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.