uxcell Plastic Aquarium 2 Ways 3mm Inner Dia Air Line Tubing Flow Control Valve 15pcs Product Name : Aquarium Air Valve;Material : Plastic Color : Black;HoleDiameter : 3mm / 0.12"(Inner Dia.), 5mm/0.2"(OD) Total Size : 50 x 24 x 16mm / 2" x 0.94" x 0.6"(L*W*T) Weight : 37g Package Content : 15pcs x Aquarium Air Valve