Jardin Y-Type 3-Way 4-Piece Airline Air Valves for Aquarium Product Name : Aquarium Air Valve; Material : Plastic Color : Clear; Connector External Diameter : 8mm/0.31", 4mm/0.15", 4mm/0.15" Total Size : 6.5 x 3.5 x 1cm/2.5" x 1.37" x 0.39"(L x W x T) Weight : 10gWeight Package Content : 4 x Aquarium Air Valve