uxcell 5-Piece Plastic Aquarium Air Valves/Splitter/Connector Set, White Aquarium Air Valve; Material : Plastic Color : White; Port Diameter : 3mm/0.118"(Inner Dia.), 5.3mm/0.2"(OD) Thread Diameter : 9.3mm/0.36";Total Size : 43 x 23 x 12mm/1.7" x 0.9" x 0.47"(L*W*T) Weight : 10g 5 x Aquarium Air Valve