Specification: Material: Plastic Color: Yellow, White Packing Includes: 1 x Air Switch Pump Valve Regulator Feature: 1.Easy to connect hose. 2.Two-way plastic valve can be used as an in-line valve to control air flow from pump. 3.Fits standard air line tubing aquarium and CO2 tubing with inner diameter about 4 mm. 4.Help to increase oxygen and keep air fresh, create healthy environment for your fish. Note: 1.Due to the light and screen difference, the item #39;s color may be slightly different from the pictures. Please understand. Make sure you don #39;t mind before you bid. 2.Please allow 1-5mm differences due to manual measurement.