Jardin Plastic Fish Tank Aquarium Fittings 3-Way Cross Air Valve, 5-Piece, Gray Product name : aquarium air valve; material : plastic Color: gray;port diameter: 3mm/0 118"(id), 4 5mm/0 17"(od) Thread Diameter: 9mm/0. 35";Total Size: 43 x 36 x 12mm/1. 7" x 1. 4" x 0. 47"(L*W*T) Weight : 10g Package content : 5 x aquarium air valve