uxcell Plastic Aquarium Fish Tank 2 Way Air Flow Control Valves 10 Pcs Black Color: Black; Package Content: 10 x Aquarium Air Valves Total Size: 43 x 23.9 x 16.2mm/1.7" x 0.9" x 0.6"(L*W*T); Material: Plastic Product Name: Aquarium Air Valve Net Weight: 27g Outlet Inner Diameter: 2mm/0.1"