Jardin Plastic Aquarium Fish Tank 2 Way Air Flow Control Valves, 6-Piece, White Product name : aquarium air valve; material : plastic Color: white;each connector inside dia: 3mm/0 1" Thread Diameter: 9mm/0. 35";Total Size: 4. 5 x 2. 4cm/1. 8" x 0. 94" (L*W) Weight : 12g Package content : 6 x aquarium air valve