Jardin Plastic T Shaped Aquarium 2 Ways Outlet O2 Lever Valve, 20-Piece Product name : 2 way o2 valve; material : hard plastic Total size: 2 9 x 1 8cm/1 1 x 0 7"(l*w); outlet diameter: 4 5mm/0 18" Color: White Weight : 10g Package included : 20pcs x o2 valve