Jardin 8-Way Air Flow Control Lever Valve for Aquarium, Brass Product Name : 8 Way O2 Valve; Material : Brass Size : 12.8 x 4.4 x 1.7cm/5" x 1.7" x 0.6"(L x D); Inlet Outside Diameter : 8.5mm/0.3" Outlet Outside Diameter : 5mm/0.2" Weight : 43g Package Included : 1x O2 Valve