uxcell Plastic Aquarium 2 Way 3mm Inner Dia Air Line Tubing Flow Control Valve 5 PCS Product Name : Aquarium Air Valve;Material : Plastic Color : Black;HoleDiameter : 3mm / 0.12"(Inner Dia.), 5mm/0.2"(OD) Total Size : 43 x 25 x 12mm / 1.7" x 1" x 0.47"(L*W*T) Weight : 10g Package Content : 5pcs x Aquarium Air Valve