uxcell Plastic 4 Ways Cross Shaped Aquarium Air Valves Splitter 5 Pcs Clear Product Name : Aquarium Air Valve;Material : Plastic Color : Clear;Connector External Diameter : 5mm / 0.2" Inner Diameter : 2mm / 0.08";Total Size : 3.5 x 3.5 x 0.6cm /1.3" x 1.3" x 0.2"(L*W*T) Weight : 7g Package Content : 5 x Aquarium Air Valve