uxcell Plastic Fish Tank Aquarium Air Control Valve Connector 15 Pcs Light Blue Product Name : Aquarium Air Valve;Material : Plastic Color : Light Blue;Connector Inner Diameter (Each) : 3mm / 0.12" Thread Diameter : 4.7mm / 0.19";Total Size : 3.7 x 2.3 x 0.8cm / 1.46" x 0.9" x 0.3"(L*W*T) Weight : 20g;Package Content : 15 x Aquarium Air Valve Durable plastic construction, 2 way design, fit for connecting most of fish tank air pump.